Theory of Constraints
Eli Goldratt built the Theory of Constraints for manufacturing in his book The Goal. It works in any business: stop trying to make every step efficient, and fix the one step holding the rest back.
The question it answers
Which one constraint, once fixed, would improve everything around it?
Use it when
Revenue is flat even though everyone is busy.
Work piles up in one spot while the people around it wait.
You’ve improved several parts of the business and the numbers haven’t moved.
It’s the wrong tool when
Nothing runs the same way twice yet. If every job or deal goes differently, there’s no repeatable flow for a bottleneck to sit in.
You’re guessing where work gets stuck. If you don’t track where things wait, what keeps breaking down and what mix of work you’re selling, you’ll pick the wrong constraint.
Everyone is still judged on how busy they look. Change the scorecard first, or the fix won’t stick.
The cell phone problem
Goldratt wrote The Goal in the early 1980s, when manufacturers were obsessed with making every stage of production as efficient as possible. The problem is that some stages take more time or cost more than others.
Take a cell phone. The microphone is easy to build and the screen is hard. Push every step to maximum efficiency and you end up with a backlog of microphones waiting on screens. You can’t build a phone without both, so the extra microphones just sit there. The screen is the bottleneck, and it sets the pace for the whole line.
Goldratt’s answer was to stop chasing efficiency at every step and fix the bottleneck. Produce items only when they’re needed. That idea became just in time manufacturing.
It works outside the factory
Goldratt wrote about manufacturing, but the theory of constraints adapts to any business. As you grow, you’ll hit a specific bottleneck at every key stage. I saw the power of fixing bottlenecks in client businesses first, and I was pleased to find Goldratt’s theory said the same thing.
The best part about fixing a bottleneck is the system wide effect. The fix ripples through the whole company and improves several areas at once.
Where owners get it wrong
They try to make everything more efficient at once. The easy parts of the business speed up, work piles up in front of the hard part, and revenue doesn’t move. Find the step that sets the pace and fix that first.
What you walk away with
The one constraint that sets the pace for your business, so your time and money go where the fix ripples through everything else.
Related frameworks
Find out if your sales team is the constraint.
The Sales Team MRI shows whether your reps are the bottleneck holding revenue back. Free for $2M to $20M businesses.
