Frank Chesworth (NCE 5 September) is right to point out that Network Rail's expected spend rate of £13.7bn in 18 months is unlikely.
This does seem an appropriate context in which to mention the technique of earned value analysis, the subject of much discussion in the Association for Project Management.
Just achieving the expected spend, as urged by Chesworth is no guarantee of performance, it is the value earned by that spend that needs to be assessed before schedule, and cost, implications can be derived.
David Shannon (M), David.Shannon@oxford projectmanagement. com