132 CHAPTER 6 THE CORE OF YOUR PLAN
The critical path
The linkages (arrows) included in Figure 6.5 show the critical path. Each activity on the criti-
cal path has to be completed before the next can begin. This path is actually the longest
path through the diagram – and the shortest possible time to completion of the project.
Assuming a 7-day week, this critical path requires 52 days (allowing 1 day for deliv-
ery). This is the expected time to completion. Unless the time taken for these activities can
be shortened, the project cannot happen any faster than this. If the target is to open on
1 June, the slack time in the overall project is 9 days.
Fastest and slowest completion times
If for each activity the minimum and maximum completion times are noted, you can then
identify the earliest and latest likely completion dates. Remember to check that these
extremes do not change the critical path. For example, if the legal adviser can shorten
step one (completing the premises lease) to 5 days, the critical path becomes the 43 days
defined by the inventory activities numbered 9 to 12. If you assign probabilities to each
time period, you can calculate the probability of opening on time.
Start and end dates for each activity
You can also work through the chart identifying the earliest and latest start dates for each
activity. As shown, the inventory planning can begin on any date between 1 and 9 April.
Activities such as this with slack time may yield resources for other tasks.
Nine steps to successful project planning
1 Break the project into the smallest possible component activities.
2 Identify linkages and critical paths.
3 Order the activities, with the critical and higher-risk ones scheduled as early as
possible in the project.
4 Set measurable targets for each activity – preferably at least one a week.
5 Assign responsibilities.
6 Set up a mechanism for tracking the reporting on each target.
7 Establish a culture that encourages problem reporting the instant that a
possible difficulty, delay or other unwanted situation comes to light.
8 Execute the plan, ticking off the completed activities.
9 Act immediately if a target is missed or a problem report is generated.