Question

You work for a company that makes cell phones and have been made the project manager for the design of a new cell phone. Your supervisors have already scoped the project, so you have a list showing the work breakdown structure, and this includes major project activities. You must plan the project schedule and calculate project duration. Your boss wants the schedule on his desk tomorrow morning!

You have been given the information in Table-1 below. It includes all the activities required in the project and the duration of each activity. Also, dependencies between the activities have been identified. Remember that the preceding activity must be fully completed before work on the following activity can be started.

Your project is divided into five major subprojects. Subproject P involves developing specifications for the new cell phone. Here, decisions related to such things as battery life, size of the phone, and features need to be made. These details are based on how a customer uses the cell phone. These user specifications are redefined in terms that have meaning to the subcontractors that will actually make the new cell phone in subproject S supplier specifications. These involve engineering details for how the product will perform.

The individual components that make up the product are the focus of the subproject D. Subproject I brings all the components together, and a working prototype is built and tested. Finally, in subproject V, suppliers are selected and contracts are negotiated.

Table-1 MAJOR SUBPROJECTS/ACTIVITIES ACTIVITY IDENTIFICATION DEPENDENCY DURATION (WEEKS) N P1 P2 P3 P4 + LOLO P4 P4 - Product specifications (P) Market research Overall product specifications Hardware Software Supplier specifications (5) Hardware Software Product design (D) Battery Display Camera Outer cover Product integration (1) Hardware User interface Software coding Prototype testing Subcontracting V) Suppliers selection Contract negotiation N D1 D2 D3 D4 S1 - D1, D2, D3 + 11 D4 D2 mttt 12 14 11,13 S1, S2 14 V1

1. Draw a project network that includes all the activities.
2. Calculate the start and finish times for each activity and determine the minimum number of weeks for completing the project. Find the activities that are on the critical path for completing the project in the shortest time.
3. Identify slack in the activities that are not on the critical path.

Please help would be appreciated i don't understand the assignment I will give a thumbs up

Answer 1

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Draw the Network Diagram as shown below: -D1 si—_D2 12 —> 13 $D4>11 —> 14 Start-P1 P2— P3 P4 S2= V2 Finish

Calculation of Earliest and Latest, start and finish schedules of activities: 2 P1 Oluwololololo 7 S2 P4 C D E F G H 1 Activities Precedence Duration ES|EF|LS|LF|Slack 2 0 2 0 2 0 3 P2 P1 4 21 6 2 6 4 P3 P2 5 6 11 6 111 5 P4 P3 5 11 16 11 16 6 si P4 5 16 21 16 21 6 16 22 19 25 8 Di 1 21 22 23 24 9 D2 Si 21 21 23 21 23|| 10 D3 1 21 22 23 24 11 D4 D1, D2, D3 41 23 27 24 28 12 11 3 27 30 28 31 13 12 D2 4 23 27 23 27 14 13 4 27 31 27 31 15 14 11, 13 4 31 35 31 35 o 16 Vi S1, S2 10 22 32 25 35 3| 17 V2 14, Vi 2 35 37 35 37 o si Si D4 12 Lowololol-- ТА 10 11 The activities having slack equal to zero form the critical path Critical Path: P1 - P2 - P3 - P4 - S1 - D2 - 12 - 13 - 14 - V2 Therefore, the minimum number of weeks is 37 weeks.

The activities of subproject are done in parallel to complete the duration of each subproject that will be equal to largest duration of activity within subproject. M Subproject Duration Precedence LP Max(2,4,5,5) = 5 I s T Max (5, 6) = 6 P Max (1, 2,1,4) = 4 S I Max (3,4,4,4) = 4 D Max (10,2) = 10 I The duration of the project = 5 +4+4 + 10 = 23 weeks Therefore, the duration of the project will decrease to 23 weeks.