The limits of a pure task list
A task-only scope can be delivered in full while the building still looks poor. Every line was performed, the schedule was met, and yet the foyer floor is marked by mid-morning because the frequency never matched the traffic. When the manager raises it, the contractor can reasonably point at a completed schedule. Nobody is at fault and nothing improves, which is the characteristic failure of a document that describes activity without describing a result.
The reverse is equally unworkable. A scope written only as outcomes, asking for areas to be maintained to a high standard at all times, cannot be priced because it has no defined quantum of work. Bidders either inflate their figure to cover the risk or price optimistically and cut back later. Both leave the manager worse off than a plain task list would have. The document has to sit between those two failures if it is going to be useful to anybody.
