Four Variables: Cost, Time, Quality, Scope

Yip's short Medium post revisits the classic project management triangle — cost, time, quality, scope — and argues for being explicit about which of the four is fixed and which is variable in any given project. The piece is two pages, which is its value: most teams hold the variables informally in their heads, and making the tradeoffs explicit changes the conversation. For product direction it is a useful reference when a project is going sideways and nobody has admitted which variable is actually fixed. Yip writes consistently clear pieces on agile and organisational design — his Medium and Substack are worth following. Short, portable, useful.