You work for a company that makes cell phones and have been made project manager for the design of a new cell phone

You work for a company that makes cell phones and have been made 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 Exhibit 4.13. 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 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.

Exhibit 4.13: Work Breakdown Structure and Activities for the Cell Phone Design Project

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            Market research                                                 P1                                       —                        6

           Overall product specifications                      P2                                         P1                         4 

                      Hardware                                                 P3                                      P2                            4

                       Software                                                P4                                        P3                            6

Supplier specifications (S)   

                      Hardware                                                    S1                                    P4                           5                                                Software                                              S2                                     P4                           6    

 Product design (D)   

                 Battery                                                               D1                                   S1                              1                                  Display                                                            D2                                  S1                                6

                 Camera                                                             D3                                    S1                             1

                  Outer cover                                                 D4                                D1,D2, D34                    4

Product integration (I)   

               Hardware                                                            I1                                     D4                         3

               User interface                                                     I2                                     D2                        4

              Software coding                                                I3                                      I2                         4

              Prototype testing                                            I4                                       I1, I3                        5

Subcontracting (V)   

Suppliers selection                                                        V1                                  S1 ,S2                     10

Contract negotiation                                                    V2                                   I4, V1                         6

a. Calculate the start and finish times for each activity. (Leave no cells blank – be certain to enter “0” wherever required.)

Activity      EST     EFT     LST     LFTP1
















b. Determine the minimum number of weeks for completing the project.

c. Find the activities that are on the critical path for completing the project in the shortest time.

multiple choice

  • P1-P2-P3-P4-S1-D2-D4-I1-I4-V2
  • P1-P2-P3-P4-S1-D2-I2-I3-I4-V2
  • P1-P2-P3-P4-S1-D3-D4-I1-I4-V2
  • P1-P2-P3-P4-S1-D1-D4-I1-I4-V2

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