If you're not familiar with the Theory of Constraints (TOC), there is a library of different books for you to choose from, starting with 'The Goal' by Eliyahu M Goldratt. In the diagram, think of a constraint as anything that restricts the flow of opportunities. If a constraint existed, say in your Opportunity Definition processes, then the orange pillar in the diagram would be higher than the other pillars. This would restrict flow in the pipe. Now typically, if product management teams are ha...