Calculate the Total Duration for the Four Activity Project

Solution:     

Scheduling work activity has associated time duration. The durations shown in the Table were estimated for the project diagrammed below. The entire set of activities would then require 3-days, since the activities follow one another directly and require a total of 1.0 + 0.5 + 0.5 + 1.0 = 3-days (answer is c). If another activity proceeded in parallel with this sequence, the 3 day minimum duration of these four activities is unaffected. More than 3 days would be required for the sequence if there was a delay or a lag between the completion of one activity and the start of another.