When a developer is in a difficult situation, where memos are needed to protect oneself from HiddenRequirements or at least dynamite the information out of the hider, time is wasted, and the anxiety level rises, keeping people out of flow.

Yet, MemosProtectTheSender, and so must sometimes be sent, as a substitute for being able to ask questions and expect straightforward answers.

ThereIsMoreToWorkThanCoding.

A way in which MemosSpeedUpDevelopment: However, when a lone programmer or pair gets interrupted every few minutes, flow is also broken for much longer than the time it takes to talk.  A memo's asynchronous nature, especially in the form of email, fixes this.

[rename to MemosAndDevelopmentTime a la SplitByTopicNotByOpinion ?]