"Everything should be made as simple as possible, but not simpler."
- Albert Einstein
1.
If t is the duration of an activity, t_{1} is the latest finish possible moment of its preceding activity and t_{2} is the earliest start possible moment, the independent float of the activity is
For the supply of materials for concrete, form work reinforcing and placing of concrete, removal of form work and curing of concrete, number of bar(s) required on bar chart, is