We know that the CODE C is the longest in the process. Estimates of time range from an optimistic time (a) of 70 hours, a pessimistic time (b) of 130 hours, and a most likely time (m) of 100 hours.

4. Calculate the expected time for this step in the precedence chart;
5. Calculate the variance and tell me what it means.

Find location; determine A Planning 20 None resource requirements B Purchasing Requisition lumber 60 and sand Planning Excavating Dig and grade site 100 Planning D Sawing Saw lumber into appropriate sizes 30 Purchasing E Placement Position lumber in correct locations 20 Sawing; Excavating F Assembly Nail lumber together 10 Placement G Infill Put sand in and under the equipment 20 Assembly H Out fill Put dirt around equipment 10 Assembly Decoration Put grass all over the garden & landscape 30 Infill; Out fill