Question

A hatmaker, fresh off a very successful showing at Lidzapalooza is excited about the prospects of providing the finest chapeaus to meet the needs of his energized customer base in the coming year. He and his space designer have identified seven activities that are necessary to expand his small shop. For the sake of simplicity, and to avoid giving away any trade secrets, the activities have been identified by letters A-G. The activities, their time estimates, and the precedence requirements structure are listed in the table immediately below.

Develop a Gantt chart for this project and indicate the finish times for each activity.

Activity Predecessors Time (weeks) 6 10 12 B, C D, E D, F

Answer 1

Gantt chart is created as follows:

Find the Earliest Start (ES) and Earliest Finish (EF) and Latest Start (LS) and Latest Finish (LF) times and Slack (S) for each activity. Earliest Start is calculated by forward path method as latest of the predecessor activities' Earliest Finish. Latest Start is calculated using reverse path method as earliest of the successor activities' Latest Start. Then calculate Earliest Finish - Earliest Start Activity Duration Calculate Latest Start- Latest Finish - Activity Duration Slack = Latest Finish-Earliest Finish, or Latest Start-Earliest Start

Gantt chart based on early times 1| Predecessor! | İ | | Slack | 2| 3|4| 5| 6| 7| 8| 9|10|11|12|13|14|151617|18|19202122232425262728293031323334353637 383940|41424044|45464748 ES LS EF LF 7 18 13 24 11 C 10 A7 7 17 17 0 6 12 C 17 17 29 29 5 B,C 172422297 11 D,E 29 29 40 40 0 D,F | 40 | 40 | 48 | 48 |