Critical Path Analysis 2 Check carefully if they want a Gantt (cascade) chart or a scheduling diagram. If it is scheduling and there are four workers, if you draw more rows it’s 0 marks. If it is a Gantt chart then you can have as many rows as you like. For both graphs there are four marks and the first two marks come from drawing in the critical path. With both graphs we count to check you have the correct number of activities drawn. Missing out an activity loses two marks. If they ask you whether it is possible to complete the project with 3 workers on time (say on a Gantt chart) check carefully if the question says to explain or to calculate. If it wants an explanation then you need 3 things i) ‘at 12.5 days ii) activities D, C, F and G are needed iii) so 4 workers needed, so it is not possible’ If it says calculate then do a lower bound eg 108/35 = 3.08 so 4 workers needed. If in doubt, do both.