Some practical rules for WBS

Here are some rules about WBS which can be applied to project practices. e.g. some of them associated with contract:

Rule 8:On small projects the following "test of reasonableness" is suggested:Ê a work package should at least be large enough to constitute a scope of work that could be competitively bid and contracted for by itself.

A number of work packages may be assembled into a contract package for procurement purposes. Within such a contract, the identity of the individual work packages should be maintained for control purposes. However, to be consistent with the Work Package definition, the following further rule must be applied:

Rule 10: The same work package must not appear in more than one contract. If this is likely to happen, the affected work package should be subdivided, and the respective parts separately defined and coded.