The number of levels it is worth including in the hierarchy is a matter of judgement. Strategies that are checked, blocked or limited by the described strategy. Strategies checking, blocking or limiting the described strategy. Strategies that are furthered, assisted, underpinned or strengthened by the described strategy. Strategies furthering, assisting, underpinning or strengthening the described strategy.
Most strategies constrain or facilitate some other strategies.
As with hierarchical relationships, mentioned above, care must be taken in indicating such functional cross-relationships. It may be that the strategy is mentioned as constraining, for example, another named strategy. The latter may however be one of a cluster of sub-strategies similarly constrained. Inserting the cross-reference to one raises the question why the 19 others are not included. Wherever possible it is better to cross-reference some major strategy of which the 20 are all a part.