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

MAJOR SUBPROJECTS/ACTIVITIES ACTIVITY IDENTIFICATION DEPENDENCY DURATION (WEEKS) Product Specifications (P) Market research P1 2 Overall product specifications P2 P1 4 Hardware P3 P2 5 Software P4 P3 5 Supplier specifications (5) Hardware 51 P4 5 Software 52 P4 6 Product design (D) Battery BI 51 1 Display D2 51 5 Camera D3 51 1 Outer cover D4 D1, D2, D3 4 Product integration (I) Hardware 11 D4 3 User interface 12 D2 3 Software coding I3 12 5 Prototype testing I4 11, I3 5 Subcontracting (V) Suppliers selection V1 51 .52 10 Contract negotiation V2 I4, V1 5 ' Activity Earliest Start Time Earliest Finish Time Latest Start Time Latest Finish Time P1 P2 P3 P4 S1 S2 D1 D2 D3 D4 11 12 13 14 V1 V2