The Critical Chain Implementation Handbook

1) Was the step correctly implemented?

Even the assumptions in the S&T trees need to be challenged and tested. Some customization might be required for a particular environment. This could mean different assumptions and different tactics.

Sufficiency Assumption: The Sufficiency Assumption indicates that there is not yet enough information to fully achieve the strategy, even if the chosen tactic is solid.

Parallel Assumption: One might be able to think of many different tactics to achieve a particular strategy. But are all tactics created equal? Does it not stand to reason that some tactics will be more effective than others? If so, how do we know we have chosen the best, most effective tactics to secure our strategy? The parallel assumptions lead u

2) Were the expected effects realized?

But is important first to stress that assumptions are just that—assumptions. Assumptions are not facts. Assumptions can be either valid or invalid.

It is possible that a single assumption is so powerful that it can lead to a tactic without an additional assumption.

of assumptions: Necessary, Parallel, and Sufficiency.

Parallel Assumptions are statements about how we perceive reality. There are usually, but not always at least two Parallel Assumptions in an S&T entity.