Finally, in subproject V, suppliers are selected and contracts are negotiated. Exhibit 5.13: Work Breakdown Structure and Activities for the Smart phone Design Project Product integration (I) User interface Software coding Prototype testing MAJOR SUBPROJECTS/ACTIVITIES Product Specifications (P) ACTIVITY IDENTIFICATION Market research P1 Overall product specifications P2 Hardware P3 Software P4 Supplier specifications (S) Hardware Software S1 S2 Product design (D) IN21 N 21 22 DEPENDENCY DURATION (WEEKS) Battery Display D1 D2 Camera D3 S1 S1 S1 Outer cover D4 D1, D2, D3 Hardware I1 12 13 D4 D2 12 | 2455 56 I4 11, 13 1274 3444 Subcontracting (V) Suppliers selection Contract negotiation V1 V2 S1,S2 14, V1 10 2220 a. Determine the minimum number of weeks for completing the project. Minimum number of weeks