Once you have sized your hidden plant, the first challenge you get will be about the denominator. It is a fair challenge and you should have the answer ready, because the two available answers are both correct and they serve different audiences.
Against scheduled time
This measures the hours you staffed, powered, and paid for. Weekends you did not run, shifts you did not staff, and planned shutdowns are excluded.
It is the plant manager’s number. It is fair to the crew, because it only counts time the plant asked the asset to produce. It is defensible on the floor, because nobody can argue that you are charging them for hours the business chose not to schedule. And it is the right basis for the case you are going to build, because the action you will propose operates inside scheduled time.
On our packaging line, that number is $10.5mm a year.
Against calendar time
This measures the asset you actually bought, all 8,760 hours of it.
It is the capital committee’s number. It answers a different question: how much of the equipment on the balance sheet is producing margin, and how much capacity is available without buying new steel. It is the number a private equity buyer runs during diligence, and it is the number that competes directly with a capital request for additional capacity.
It is always larger, sometimes dramatically so, and it is uncomfortable in a way that is occasionally productive.
Why the choice matters more than the arithmetic
Use the wrong one in the wrong room and you lose the room.
Put the calendar time figure in front of a crew that has been working hard and you have told them, in effect, that their best week was a fraction of what it should have been. It reads as an accusation regardless of your intent, and the honest counting you are about to ask them for will not happen.
Put the scheduled time figure in front of a capital committee that is weighing a new line and you have understated your own case, because the committee is deciding about the asset, not about the shift schedule.
The rule is simple. Build the case on scheduled time. Keep the calendar time number in your pocket for the capital conversation, and produce it only when someone proposes buying capacity you may already own.
The reflex this is aimed at
When demand rises, the reflex is a capital request. New line, new packer, new building. The business case is straightforward, the approval path is well worn, and the request moves quickly because everyone involved knows how to evaluate it.
Meanwhile the hidden plant sits inside assets already on the balance sheet. It requires no capital approval, no installation window, no ramp up curve, and no additional floor space. And it produces nothing, because nobody has sized it and therefore nobody has proposed it.
The question worth putting in front of leadership is not whether to add capacity. It is whether to collect the capacity already purchased before purchasing more. That question has never been asked in most plants, and it is not asked because the number required to ask it does not exist.
The objection you will get
“We cannot sell everything we make.”
This is the right challenge and it deserves a real answer, which is that recovered hours can be taken three ways. As volume, where they convert to margin at full value. As cost, by running fewer scheduled shifts for the same output and removing premium labor and utility hours from the base. Or as capacity held, where the hidden plant becomes a capital avoidance argument and the next line gets deferred by years.
The mistake is treating an unsellable hour as a free one. It is not free. It was paid for.
This week
Calculate both numbers. Present one. Know which room you are in.
