Reconsider the Electronic Toys Co. problem presented in Prob. 10.4-5.

Sharon Lowe is concerned that there is a significant chance that the vitally important deadline of 57 days will not be met. Therefore, to make it virtually certain that the deadline will be met, she has decided to crash the project, using the CPM method of time-cost trade-offs to determine how to do this in the most economical way.

Sharon now has gathered the data needed to apply this method, as given below.

The normal times are the estimates of the means obtained from the original data in Prob.