Question 12 a) How can managers attain flexibility in controlling a project? b) Discuss the usefulness of PERT and CPM. 121 141 C) Schware Foundry, Inc., a metal works plant in Tucker Valley Park, Macoya, has long been trying to avoid the expense of installing air pollution control equipment. The local environmental protection group has recently given the foundry 16 weeks to install a complex air-filter system on its main smokestack. Schware Foundry was warned that it will be forced to close unless the device is installed in the allotted period. Kimberley Headley wants to make sure the installation of the filtering system progresses smoothly and on time. All activities involved in the foundry project are shown in the Table 1 and Table 1.1. 131 i) ii) iii) List some possible concerns of the project manager. What is the probability that the project can be completed within 16 weeks? What information did PERT (three time estimate) provide Schware? 1121 151 ACTIVITY DESCRIPTION IMMEDIATE PREDECESSORS A Build internal components Modify roof and floor Construct collection stack A Pour concrete and install frame B Build high-temperature burner Install control system Install air pollution device DE Inspection and testing F G Table 1 Activities and Immediate Predecessors for Schware Activity Optimistic Time Pessimistic Time Most Likely Time A 1 3 2. B 2 3 1 3 2 D 2 6 4 4 E 1 7 F 1 9 2 G 3 11 4 H 1 3 2 Table 1.1 Time Estimates (in weeks) for Schware