Start calculations with day zero. Question 8 (5 points) Saved The forward pass is a: Question 8 options: assigning logic relationships for succeeding activities. E 3 H B T 5 5 00 - A 4 с 6 K 8 6 3 5 2 2. A critical activity is an activity whose delay will delay the project. RELATED LINKS. Interfering float is given by \({F_{INT}} = {F_T} - {F_F}\) = S j Independent float is the time by which starting or finishing of an activity can be delayed without affecting the total float of its proceeding and succeeding activity. F IN = F T - F F = S j. It is the difference between the total float and the free float of an activity. Pick up the correct statement from the following: A. Calculate the total, free, and interfering float of activity 20 . オンライン学位 学士号と修士号の詳細を見る; MasterTrack™ 修士号取得に向けて単位を取得 大学証明書 大学院レベルの学習でキャリアアップを目指すPutting the list in order, putting the numbers where the next one fits in orderSoftware Project Management 4th Edition Chapter 6 Activity planningThe calculated values in fields ‘EST’, ‘EFT’, ‘LST’, ‘LFT’, ‘Total Float’, ‘Free Float’, ‘Independent Float’, and ‘Interfering Float’ have been shown in Fig. total float c. This is spare time associated with a particular activity. The float calculations for the sample schedule are shown in Exhibit 5. F IN = F T - F F = S j . UNIT IV MONITORING AND CONTROL 1) What is the purpose of project monitoring and control? Ans: The purpose of project monitoring and control is to ‘keep the team and management up to date on the project’s progress. Total float: It is the time by which starting or finishing of an activity can be delayed without affecting the schedule completion period of a project. • What is meant by crashing a network. Update is the process of revising activity data to incorporate actual progress. 3) Independent float: It is the excess of minimum available time over the required activity duration; F I = (T_E^j - T_L^i - t_e^{ij}) 4) Interfering float. identify the activities which can be delayed without. (Xii) Free Float The free float of an activity is the amount of time by which the activity can be delayed without interfering with the start of succeed- ing activities. Terminology : An activity : is a task which needs to be done and takes an :. Interfering Float. This time depend on what tasks are involved. e. 2 Make a clear and. Pharmacy. Where, F T is Total Float, F F is Free floatIn construction project, float or slack is the amount of time that a task in a project network can be delayed without causing a delay to: 1. C. What is the Interfering Float of Activity i-j?Total Float: It is the maximum delay possible for an activity without considering any delay in its precedence or succeeding activity. Hence, the float for the second path is 13 days. free float = total float – head event slack. Equations for total float and interfering float remain unchanged. The critical path is a single path that defines the duration of the project. Also, determine (show calculations) the independent float and interfering float for Activity K E 4 3 M F 6 J A 1 N 10 3 K 5 4 5 Q 2 5 EET ES EET EF Duration LET LS LE LET4. Free float is how long an activity can be delayed without delaying the Early Start of its successor. Interfering float. Independent float is that portion of the total float within which an activity can be delayed for start without affecting the float of the preceding activities. Float for the fifth path = 31 – 16 = 15 days. Successor's LS, Predecessor's LF and duration of the activity. Using these formulae the values are calculated and tabulated in the table. Q. Free Float: The amount of time that a schedule activity can be delayed without delaying the early start date. Develop a (i) bar chart, (ii) an activity-on-arrow (AOA) diagram, and an activity-on- node (AON) for the following project. which. Pick the wrong relationship: A. Amount of time a project can be delayed without impacting an imposed deadline. Project managers usually apply schedule adjustments to develop an efficient CPM schedule. Calculate the total, free, and interfering float of activity 20. Interfering float The amount of time a task can be delayed without pushing a project past its committed deadline is Interfering Float. If the float is positive and the activity is delayed by a period equal to its total float, the completion of project is not delayed; The float may be positive, zero or negative. Free Float for i-j F F = T j E - (T i E + t ij) Interfering Float (F IT): It is defined as the difference between the total float and the free float of an activity. 2. interfering float (IF), and independent float (IF) for each activity in a tabular form. 6. This video includes explanation and calculation of interfering float. none of the above1. Independent float: It is the minimum excess available time which exists without affecting any of succeeding or preceding activities. Interfering Float • Interfering Float is the time span in which the completion of an activity may occur and not delay the termination of the project, but within which completion will delay the start of some following activity • The portion of total float which affects other activities but not the project finish date. It is the chain of stages formative the least time needed for an. PMBOK Guide definitions of Total Float and Free Float. 6k points) selected Feb 23, 2022 by Ritikgupta . See Answer See Answer See Answer done loading 25 . It affects only preceding activities. Show the critical paths on the network diagrams. Free float for any activity is defined as the difference between. The float that is owned exclusively by one activity. e. Operating System Structure Float / Slack Total Float : The total time that a schedule activity may be delayed Total Float = ( LFT – EFT ) or ( LST-EST) Free Float : Free Float is the time by which the completion of an activity can be delayed beyond the EFT without affecting the EST of succeeding activity Free Float = EST (succeeding) – EFT. Given, expected duration of project = 47 days, variance = 9 days. About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new. It only affects concerned activity. g. Thus, if an arrow notation activity A ij of duration d ij is considered joining nodes i and j and T ( E , ij ) and T ( L , ij ) are earliest and latest start node time. 31) shows that in order to calculate the total float, it is necessary to carry out the forward and backward pass. Question 7 options: Total float Interfering float Free float Independent float . Interfering Float: It is similar to head event slack. More simply, the range an activity can move around without affecting the end date of the project. Who are the experts?Also compute the free float (FE1, interfering float f IFE and independent float (IF I for each actin it) in a tabular form fix the AOA and a separate table for AON. 5. Concept: Independent float is the time by which starting or finishing of an activity can be delayed without affecting the total float of its proceeding and succeeding activity. Interfering float refers to the amount of float that affects the project's critical path, while total float represents the total amount of time a task can be delayed without delaying the project. 0 votes . Create Powerpoint Explainer Videos. It is given by Total float - Free float. following activity. Expert Help. unexpected conditions, cannot O b. 1: (a) To reach P, the light waves from S1 S 1 and S2 S 2 must travel different distances. None of the above . is shared between two or more activities. 건축공사에서의 Bench Mark. However, it should be understood that delaying an activity. In our case, Total Float = (duration of path D-E-H) – (duration of path D-G-H) = 17 – 15 = 2 Days. Duration O b. Interfering float 105. This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. answered Feb 23, 2022 by Kartikpandey (35. This is where float in project management comes in. It is thus equal to the head event slack. Total Float: The total amount of time that a schedule activity may be delayed from its early start date without delaying the project finish date, or violating a schedule constraint. 5 Ratings (14 Votes) Answer2. Compute the values of ES, EF, LS, LF, FF, and TF for the activities. • Interfering float = total float – free float . Important Points. Total Float. Independent float is that portion of the total float within which an activity can be delayed for start without affecting the float of the preceding activities. Learn more. F IN = F T - F F = S j . It is the difference between the latest finish time of the activity in. The interference float is computed as If the interference float is positive, then it describes the maximum permissible delay when all its succeeding activities start as early as possible and all its preceding activities finish as late as possible. CPM (1) Construct the AON, AOA networks and compute the ES, EF, LS and LF times. Interfering Float. Thus, the critical path of the project is A-C-F-H. In this instance, delaying a task may delay the start date of another noncritical task or activity, but it may not impact the start date of a critical task. Q 11. F = TF - FF. duration b. The early start time for the first activity of any network is day _____. Equations for total float and interfering float remain unchanged. However, the FM Network can accept no responsibi. Event slack is defined as the difference between the latest event and the earliest event times. Advertisements. Upate. All the above. 3 represents a portion of an arrow network. It is the difference between the latest finish time of the activity in question and the earliest starting time of the following activity or zero, whichever is larger. Question: 10. Using the same process, we can also calculate the float for other paths. 10 represents the activities for constructing a culvert. c. i, iv c. Free Float = Lowest ES of successors – EF. Fishing float tubes are available from the major online outdoors and fishing retailers and generally cost anywhere from $100 to. 3. Interfering Float: It is that part of the total float which causes a reduction in the floats of the succeeding activities. Compute the free float of activity J. Interfering float . It is the difference between total float and free float. An activity can be delayed by an amount up to its independent float without delaying the start of any other activity. interfering float e. Total float is the amount of time an activity can be delayed without delaying the project. F = T E j − T L i − t i j = F F − S i. The book value of the machine at the end of. Freefloat : Portion of the total float within which an activity can be manipulated without affecting the floats of subsequent activities. . Whereas free and total float are about the time an activity can be delayed, project float is the time of delay based on imposed deadlines. Between total float, interference float, and independent float, which one of the following is the correct sequence in the decreasing magnitude order? Q. Interfering float . That means, we have the slack time available due to time of Late finish / Early early finish of the activity. The total float shown in Table 6. Question: 0401 437 12. An interfering person gets involved in other people's lives in an unwanted and annoying way: 2…. This ensures that the float behaves. Calculate the total, free, and interfering float for the following problem d. The critical path method (CPM) is widely used as a project management tool for planning and scheduling. following activity. Critical path is the most important sequence of activities which has no float and which determines the project completion period. Free float for an activity corresponds to the concept of making available to the activity only that amount of available time that does not interfere with subsequent activities. 3. Don’t forget to check out the video. Costs Involved in Project Crashing: Direct, Indirect, Penalty and Total Costs. It does not affect the start of succeeding activity i. Start calculations with day zero. Defaults to 0. c ) portion of interfering float. Show the critical paths on the network diagrams. On the arrow network diagram below, compute the early and late event times ( TE and TL) for each node and the four floats (the total float, free float, and interfering float) for each activity. After entering relevant input through GUI, critical path and. Question: 4. This Float does not interfere with the float time available by the Predecessor activity. (3) Highlight the CPM on the AON, AOA networks. Interfering float is that part of the total float which causes areduction in the float of the successor activities. Free float: The time span by which delay can be made without delaying the succeeding activities. It is the part of the total float that remains after free float is deducted. It affects only preceding activities. Share. Total float 103. Interesting explanation of the types of schedule float. 10 represents the activities for constructing a culvert. F IN = F T - F F = S j. FREE FLOAT = EST (succeeding) – EFT (present) • INTERFERING FLOAT: Part of total float that causes reduction in the total float of. 8) Shortening Project Duration To shorten the overall durations of a project we would normally consider attempting to reduce activity durations. can affect the float of. • Interfering float: the difference between total float and free float. Independent float F I D: It is defined as the amount of time by which an activity can be delayed without affecting the succeeding activity and preceding activity. J,K D, K E. Interfering Float INTF is defined as the time span in which the completion of an activity may occur and not delay the termination of the project but within which the completion will delay the. E (Value Engineering) 6. If the float is positive and the activity is delayed by a period equal to its total float, the completion of project is not delayed. Practical Definition: Slack or Float provide flexibility in the project schedule. Free float: The delay can be made without delaying succeeding activities. Interfering Float: (F IN) The maximum amount by which an activity can be delayed without delaying the project but will cause delay to the Early Start of some following activity. 2. There can be more than one critical path in a project. This flexibility can be at the project level or the activity level gives different choices. 3. Interfering float= LFT(present)- EST(succeeding)This problem has been solved! You'll get a detailed solution from a subject matter expert that helps you learn core concepts. Interfering float is the difference between Total float and Free float Total float and Independent float Independent float and Free Float None of the aboveTotal Float. Fishing float tubes are available from the major online outdoors and fishing retailers and generally cost anywhere from $100 to. Interfering Float - (Measured in Day) - Interfering Float is the amount of time a scheduled activity can be delayed or extended from its early start date without delaying the project. Civil Engineering questions and answers. (An activity can have this float only if it has a free float. Total Float is the total amount of time a task can be delayed and still keep the project on schedule, while Free Float is the amount of time a task can be delayed without impacting other tasks in the project. TFi = LSi - ESi TFi = LFi - EFi. d). 2601636 Keywords: project management; critical path method; floats; activity network IntroductionQuestion: Consider the following information about a project whose activities are only connected through regular FS relationships (no lags) An Activity A has a total float of 10 days, of which 9 days are interfering float Its only succeeding activity, Activity B, has a total float of 12 days. Where, T L j = T he Latest expected time for event j, T E j = The Earliest allowable time for event j. (c) Calculate the total, independent and interfering float times, for each activity. Interfering Float: (F IN) The maximum amount by which an activity can be delayed without delaying the project but will cause delay to the Early Start of some following activity. Once the free float has been used (or if it is zero), the interfering float tells us by how much the activity may be delayed without delaying the project end date;The total float of an activity can be classified into free float, independent float, and interfering float. Total float represents the amount of time an activity can be delayed without delaying the overall project duration and is also called “float” or “slack”. Earliest occurrence time (T E):(x) (b) Explanation : Interfering float is that part of the total float which causes a reduction in the float of the successor activities. B. This is why it is the most contested item in disputes and delay analysis. Answer: Option A. It is calculated by subtracting free Float from the total float of the activity. Show the potential critical activities on the bar chart and critical paths for the AOA and AON networks. 1. Terms and Definitions TYPES OF FLOATS Interfering Float (FIT) : Another name for head event slack (Sj), it is the difference between total float and free float FIT= FT–FF = TLj –TEj = Sj Note : if the total float (FT) for any activity is zero then such activity is called critical activity Critical Activity : an activity is said to be. It only affects concerned activity. d ) none of the above. Who owns the float? 111. Interfering float: the difference between the total float and free float. 4. 2 Critical path is the largest path with shortest duration within which the project can. 5 IN the critical path Method of project planning, free float can be (B) (C) (D) Greater than independent float Greater than total float Less than independent float Equal to total float . In the context of activity-on-arrow (AOA) network representation, textbooks on project management, based on our survey, have for decades been using a popular formula to calculate free floats that. 3. Reduce activity times along the critical path we must continually check for any new critical path emerging and redirect the. Calculate Total Float. 시방서의 종류 및 포함되어야 할 주요사항. 26. Total float and independent float. PROJECT FLOAT. i)Critical path ii)Float iii)Free float iv)Interfering float v)Hammock activity • Critical path is the path through network with zero floats. About us. 건설산업에서의 IPD(Integranted Project Delivery) 9. In case it is negative, the IF is the minimum required shortening of the duration of the activity. Correct answer: (B) independent float. Interfering Float: (F IN) Maximum amount by which an activity can be delayed without delaying the project but will cause delay to the Early Start of some following activity; It is the difference between total float and free float. Free float: It is the amount of time that the activity completion time can be delayed without affecting the earliest start time of the immediate successor activities in the network. A critical path is an activity or event that, if delayed, will delay project completion. How To Tekno juga akan membagikan beberapa tipe data Float. 2. Floating on both sides separately without interfering. 22. (a) Construct an activity network for the preceedance tables. Who are the experts?3. Learn more. Exhibit 5. Interfering float: It is similar to head event slack. Paid Online Writing Jobs. Interfering Float: Maximum amount by which an activity can be delayed without delaying the project but will cause delay to the Early Start of some following activity. F IN = F T - F FFloat is the amount of time by which an activity can be delayed or extended. This is quite commonly used, particularly in association with the free float. Hence the correct answer. . Project Float 4. Duration Lag Activity IPA Duration Lag Activity IPA A 4 E B 4 B 9 F B,C 2 С A 6 D G 6 A E 3 D 4 B 2 2 H F,G 3For the network diagram shown, duration of each activity are in weeks. The Interfering float of activity C is 15. Question: For the arrow network information provided below, without drawing a network diagram, calculate the early start and finish dates, the late start and finish dates, the total float, free float, interfering float, and the independent float. However in the Gantt (bar) chart it further indicates the type of float. (a) Compute the relevant information and include the information on the figure, and complete the following table: Early Finish Late Finish Free Float Total Float Finish grade Gravel roadway Compact road Set entry gate b) The critical activities are: c). The free float for the activity (i, j) is the excess available time over its duration. During PMP® coaching sessions, I observe […] Interfering Float (INTF): The amount of time that a schedule activity can be delayed or extended from its early start date without delaying the project finish date, but delaying an activity into interfering float will delay the start of one or more following non-critical activities. Float or slack is the amount of time that a task in a project network can be delayed without causing a delay to subsequent tasks ("free float") and project completion date ("total. Early Finish (EF), Late Start (LS), Late Finish (LF) for all activities? C) Find Total Float (TF), Free Float (FF). Concept: Independent float is the time by which starting or finishing of an activity can be delayed without affecting the total float of its proceeding and succeeding activity. Independent float does not affect other activities. Total float is the difference between the finish date of the last activity on the critical path and the project completion date. Interfering float is the time available to delay an activity without delaying the project’s estimated completion time, but delaying an activity into. In other words,. following activity. Independent float: It is the minimum excess available time which exists without affecting any of succeeding or preceding activities. Free float O d. Total Float is. Interfering float: the difference between total float and free float. Interfering Float (INTF) 5. interfering翻译：爱管闲事的。了解更多。 Between total float, interference float, and independent float, which one of the following is the correct sequence in the decreasing magnitude order? Q. Dự trữ gốc (Interfering Float): thời gian dự trữ khởi công của công việc ij, trong đó sự hoàn thành công việc có thể thay đổi mà không ảnh hưởng đến thời gian hoàn thành dự án nhưng ảnh hưởng đến thời gian bắt đầu của các công việc phía sau vàThe floatation unit comprises at least one floatation cell (5), by means of which a cleaned accepted material (7) and a floating floatation foam (3, 4) containing interfering substances, reject, which flows out into a foam collection channel (8, 9) from the surface of the paper fibrous-material suspension (S), are formed in that an air flow is blown into the fiber. . • The time span in which the completion of an activity may occur and not delay the termination of the project but within which completion will delay the start of some other following activity (non-critical ones). activities in the network. FF=EST Of its following activity—its Erl' (Xiii) Interfering Float It is the difference between the total float and the free float. interfering (shared) float d. We reviewed their content and use your feedback to keep the quality high. Critical activity is an activity with zero or negative float. 2 weeks B. -2 weeks C. PDM was eventually extended to calculate Fondahl's link lag concepts for SS, FF, and SF relationship types. . Interfering float (INTF) INTF refers to the time you can delay a task from the date you planned to start it without delaying the project's completion date. The independent float affects only. Langsung saja simak apa itu Float CSS dan bagaimana fungsinya. In general, float is the amount of time you can wait to start something and not make it 'late'. The reasonB. It is thus equal to the head event slack. Note: In case a negative value is obtained, it is taken as zero. Computer Science questions and answers. ALL ABOUT CRITICAL PATH METHOD (CPM)…Total Float and Free Float are very different concepts. critical float interfering float is the amount of time the ES of an activity can be delayed without delaying the _____ but which will delay at least one _____ Interfering float. Identify all potential critical activities on the bar chart. Interfering float: It is similar to head event slack. Independent Float: It is the minimum excess available time which exists without affecting any of succeeding or preceding activities. It is also equal to the head event slack of the activity Thus interfering float of an activity - TF - EF = (L-E) of the head event of the activity Subcritical Activity : Activity having next higher float than the critical activity is called the subcritical A. independent float [enumerate] types of floats. subsequent tasks (“free float”). Interfering Float = Total Float – Free Float Independent Float (INDF) Interfering Float is the maximum amount of time an activity can be delayed without delaying the early start of the succeeding activities and without being affected by the allowable delay of any predecessor activity. Independent Float: It is the minimum excess available time which exists without affecting any of succeeding or preceding activities. 26/2023-24). In the Critical Path Method of scheduling, following types of the float can be calculated are total float (TF), free-float (FF), interfering float (INTF), and independent float (INDF). Disclaimer: Every effort has gone into ensuring the accuracy of this document. 10 B Figure P10. Total float A contingency is used to cover conditions that reasonably be determined during the design, change orders, and other project risks. When you stall a task, two scenarios can happen. Free Float (FF) = the maximum amount of time an activity can. Free Float = Lowest ES of successors – EF. g. -3 weeks A. The total float and the free float on activity "3-6" in the following project Free Float identifies the window of opportunity during which a task can be rescheduled without causing a ripple effect on subsequent tasks or the project timeline. Civil Engineering. i, iii b. 5 videos 1 discussion prompt. Interfering Float: Maximum amount by which an activity can be delayed without delaying the project but will cause delay to the Early Start of some following activity. P. Activities that have strict start and end times are considered to be critical. A: Basic concept introduction- Float- Float is associated with the activity times. By definition: Total Float (TF) = the maximum amount of time an activity can be delayed from its early start without delaying the entire project. (1) shows a graphical representation for the popular float types, which are discussed in the next section. Negative float 107. 3. causes a reduction in the float of the successor activities. O week B. The reason Interfering Float was calculated was so that it was part of the activity record (with punch cards, etc it was very difficult to include data from different record types in a report). 1. 7. Independent float does not affect other activities. Total Float = Latest start - Earlier start Free Float = Next activity Earlier start time - Current Activity earlier finished time Interfering Float = Total Float - Free Float Independent Float = Next activity Earlier start time−Current Activity Latest finished time - Activity duration. Types: Total Float = LFT – EFT or LST-EST Free Float = EST(Its Successor Activity)- EFT Interfering Float = TF-FF Independent Float = Excess of minimum available time over the required activity duration. Based on the simple finish-to-start relationship, the calculation of INTF can be formulated by Equation (4), in. c. Interfering float is shared between two or more activities. i, ii, iv Soln: Total = 10=Free= Independent; Interfering = 0; 14. 9. TreatmentAns. A close inspection of the precedence diagram (Fig. total float =free float + independent float. Interfering Float = Total Float – Free Float 5. 1-2, 2-3, etc. Interfering float: It is similar to head event slack. The given relationship "Interfering float = Total float – Free float" is incorrect. How long is the project duration? Successor(s) Duration APTER Act. Question: The time by which activity completion time can be delayed without affecting the start of succeeding activities, is known as Select one: a. 7. Float or slack is the amount of time that a task in a project network can be delayed without causing a delay to subsequent tasks ("free float") and project completion date ("total float"). Ans. The difference between total float and free float, is called interfering float. INTF is defined as the time span in which the completion of an activity may occur and not delay the termination of the project but within which the completion will delay the start of some other following activity . Interfering float is the difference between _____. Free float: The time span by which delay can be made without delaying the succeeding activities. Also, determine (show calculations) the independent float and interfering float for Activity K. Ans. 7. Once this has been done, the total float of any activity is simply the difference between the latest finishing time (LF) obtained from the backward pass and the earliest finishing time (EF) obtained. Using the AOA and AON diagram, (i) identify the critical path, and (ii) calculate the total float, free float, interfering float, and independent float for each. Show the critical paths or potential critical paths on the network diagrams. 1st lift 20 Dummy 2nd Fix 2nd lift activity 2-3 allocated arrow diagram bar chart Beam Bill of Quantities bricklayers Brickwork calculated Cast Concrete Slab chapter Check Sheets complete computer print-outs contract contractor cost critical activities critical path Critical Path Method day numbers delay Description of Activity drawing Earliest. Interfering float is the difference between. I need 10 minutes to eat, but can't. (c) Calculate the total, independent and interfering float times, for each activity. Understanding Work Dates and Calendar Dates In this module, the difference between working dates and calendar dates is explained and how to chart both in a project plan. Total Float. On the arrow network diagram below, compute the early and late event times ( TE and TL) for each node and the four floats (the total float, free float, and interfering float) for each activity. Compute the remaining total float, free float, and interfering float values for Activities G. Pada kesempatan kali ini, How To Tekno khusus membahas tipe data Float. 414 hours ago · Civil Engineering. Float or slack is the amount of time that a task in a project network can be delayed without causing a delay to subsequent tasks ("free float") and project completion date ("total float"). Halibut Cove is a very wealthy enclave, and many residents do not understand that it is navigable waters and therefore completely legal to land floatplanes there. The time by which a particular activity can be delayed without affecting the preceding and succeeding activities is known as a) Total float b) Free float c) Interfering float d) Independent float. project completion date (“total float”). It can interfere more with vision than other floaters. This answer was edited. Exhibit 5. amount of time an activity can be delayed without . Added an answer on October 7, 2020 at 8:00 pm. In this video, you will learn the basic fundamentals of interfering and free float of an activity on a project. The salvage value at the end of 10 years is Rs. • INTFi = TFi – FFiWe would like to show you a description here but the site won’t allow us. Download Solution PDF. In project scheduling, the free float (slack) of an activity represents the leeway for scheduling the activity without affecting any subsequent activity. It only affects concerned activity. Armed with this new knowledge, we can turn our OldTV into a fully configurable effect. Interfering Float - (Measured in Day) - Interfering Float is the amount of time a scheduled activity can be delayed or extended from its early start date without delaying the project finish date. Start with the critical path, beginning at the last activity’s late finish. 6 D / C TFF EET ES EFEET LETLS Duration LF LET. A project’s total float is the difference between the finish date of the last task on the critical path and the project completion date. Journal of the Operational Research Society (2003) 54, 1296-1299.