Concept explainers
A.
Interpretation: The minimum time and the total direct cost of completing the project where two programmers develop a commercial software package on time is to be computed.
Concept Introduction: Network diagram is a graphical representation of tasks and events happening in a project. It depicts the work flow and is used to compute the total duration of the project.
B.
Interpretation: The difference in the total direct cost of completing the project at minimum activity times as against the regular times is to be computed and the underlying reason is to be explained.
Concept Introduction: Network diagram is a graphical representation of tasks and events happening in a project. It depicts the work flow and is used to compute the total duration of the project.
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Production and Operations Analysis, Seventh Edition
- Assume that the activities in Problem 3.11 have the following costs to shorten: A, $300/week; B, $100/week; C, $200/ week; E, $100/week; and F, $400/week. Assume also that you can crash an activity down to 0 weeks in duration and that every week you can shorten the project is worth $250 to you. What activities would you crash? What is the total crashing cost? Note: The attached photos is the activities in problem 3.11.arrow_forwardThe key objectives of a project can be summarized in the form of a The key objectives of a project can be summarized in the form of a multiple choice line. triangle. square. hexagon.arrow_forwardA project that you are managing is into six months of its accomplishment andthe planned duration is also six months. You are now reviewing the projectstatus. The actual cost of Activity A and B are RM 200,000 and RM 100,000respectively. The planned value for Activity A and B are RM 180,000 and RM80,000 respectively. The Activity A is 100% complete whereas Activity B isonly 75% complete. (a) Formulate the problem to determine whether the project is on-time and on-budget after six months using the Earned Value Analysis (EVA) method. (b) Generate the expected “cost at complete” and “time at complete” to finishthe project at this pace. (c) Present two initiatives to be undertaken by the project manager to improvethe situation based on Q4(b).arrow_forward
- b) Assuming that each task is started as soon as possible, construct the corresponding resource loading diagram for the project. c) How would you rearrange the timing of project activities to reduce the fluctuation in resource demand? Assume that the overall project duration cannot be extended. Remember that the specified precedence relationships must be maintained. d) If there are only 20 workers available for the project, how would you assign workers to tasks to ensure that the project can be completed without violating the resource limit? In this case, the project duration may be extended if necessary (but without violating precedence relationships). e) Given the results from (c) and (d) above, what recommendations would you make to senior management regarding the staffing of this project, and why?arrow_forwardThe North Carolina Department of Transportation is undertaking a construction project to widen a large section of interstate highway near Charlotte, NC, which includes the construction of a number of new bridges, interchanges, and overpasses. The first step in the project is the appointment of a project manager and the development of a project team, some of which will be departmental employees and others will be private consultants and operatives. The team of a project of this size also requires a large support staff with varying technical skills. Once the team is selected and the staff is in place the first task is to select a primary contractor to manage and oversee the actual construction. The following table gives the standard activities required for the planning and scheduling of this process. Activity Description Predecessor Time (weeks) Optimistic a Most Likely m Pessimistic b a b c d e f g h i j k L M Select project manager Develop a team recruitment…arrow_forwardA contractor has a job which should be completed in 120 days. At present, he has 80 men on the job and it is estimated that they will finish the work in 150 days. Of the 80 men, 50 are each paid Php 150.00 a day, 25 at Php 210.00, and 5 at Php 280.00. For each day beyond the original 120 days, the contractor has to pay Php 1,500.00 liquidated damages. How many more men should the contractor add so that he can complete the work on time? Use continuous computations, round off your final answers to two (2) decimal places.arrow_forward
- You may need to use the appropriate technology to answer this question. Use the following network with activities and times estimated in days to answer the questions. A project network with 13 activities and 17 directed arcs is shown. Activity Start is connected to activity A, to activity B, and to activity C. Activity A is connected to activity D, to activity E, and to activity F. Activity B is connected to activity F. Activity C is connected to activity G and to activity H. Activity D is connected to activity K. Activity E is connected to activity I. Activity F is connected to activity I. Activity G is connected to activity I. Activity H is connected to activity J. Activity I is connected to activity K. Activity J is connected to activity K. Activity K is connected to activity Finish. Activity Finish has no arcs directed to other activities. Activity Optimistic Most Probable Pessimistic A 2 5 6 B 1 3 7 C 5 6 9 D 5 12 14 E 3 4 5 F 9 10 13 G 4 6 8 H 3 6 8 I 5 7 12 J 11 12 13 K 1 3 4…arrow_forwardConsider the AON graph of a project shown in Figure 19.18.The activity times are 3, 4, 2, 5, 7, 2, 2, and 3 days for activities A1 through A8, respectively. What is the earliest completion time of the project?arrow_forwardThe information below shows the order in which the activities of a project occur alongwith the time taken for each activity:Q must follow PR must follow PS must follow PT must follow SU must follow S and TV must follow S and TW must follow P, Q, R, S, T , U, VP takes 8 minutesQ takes 6 minutesR takes 6 minutesS takes 3 minutesT takes 3 minutesU takes 7 minutesV takes 7 minutesW takes 18 minutesConstruct an activity network to represent the project information given. Include the earlystart, early finish, late start and late finish times for EACH activity. Hence, determine thecritical path for the project.arrow_forward
- Given problem: A contractor has a job which should be completed in 120 days. At present, he has 80 men on the job and it is estimated that they will finish the work in 150 days. Of the 80 men, 50 are each paid Php 150.00 a day, 25 at Php 210.00, and 5 at Php 280.00. For each day beyond the original 120 days, the contractor has to pay Php 1,500.00 liquidated damages. How many more men should the contractor add so that he can complete the work on time? *Do show solution. Round off final answer in 2 decimal places. Thank you.arrow_forwardI need assistance with the following questions in: Project Scheduling. This is a follow up to a question answered earlier. Question 1) was answered. 1) A company decides to plan a project, with activities, precedences and deterministic durations given in the following table: Activity i Duration (days) Immediate Predecessors A 32 none B 21 none C 30 none D 45 A E 26 A, B F 28 C G 20 E, F 2) The company decided that the project in the previous problem has to be expedited in order to optimize (minimize) the project cost. Expediting can be used to trade direct cost for indirect cost, since expediting the project reduces the indirect cost of the project by a fixed amount per day, while expediting an activity increases its total direct cost. The Accounting Department found that indirect costs amount to $100 per day, while activity direct costs as well as their normal and expedited times are given in the table below.…arrow_forwardA project consists of Six activities: A,B,C,D, E, F. A and B have no preceding activities, but activity C requires that activity B must be completed before C can begin. Activity D cannot start until both activities A and B are complete. Activity F can start any time. Activity E requires activities A and C to be completed before it can start. If the activity times are A: 10 days; B: 4 days; C: 8 days; D: 3 days, E = 2 days, and F: 1 day, * Find out the minimum time possible to complete this project. * Are there any critical path activities? Which one are those?arrow_forward
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