Idle Capital Drag
It is money you spend owning and financing equipment that is not cutting, molding, or running.
Formal definition
Idle capital drag estimates the dollar cost of machine idle time, typically idle hours multiplied by the fully loaded machine hourly rate.
Why it matters
A machine payment runs whether the spindle spins or not — idle drag is invisible margin leak.
Where you see it
- OEE and utilization dashboards
- Shop floor supervisor reports
- Equipment ROI post-mortems
- Lean manufacturing projects
- CapEx approval memos
Worked example
- Idle hours this month: 40.
- Machine hourly rate: $85.
- Idle capital drag = 40 × $85 = $3,400.
- Interpretation: $3,400 of machine cost produced no parts this month.
How Business metrics calculates it
Inventory or WIP that is not turning, in dollars as computed.
Where people fool themselves
Idle capital that is safety stock for a 26-week lead time is not idle; it is the lead time. Drag is stock above that policy. Say the policy.
Run it on your own numbers: the Manufacturing calculator.