HVAC Ductwork, Air Handling & Mechanical Products worked example
Duct Sheet Yield at 68% shop yield target: a worked example
This worked example runs the duct sheet yield numbers for a tougher week than the baseline: 68% shop yield target instead of the typical 95%. Calculate the sheet metal yield rate for duct fabrication. Compare accepted duct sections or blanks against total sheet metal processed to find your current yield and the gap to your shop target.
The inputs for this scenario
- Accepted duct sections or blanks: 233 pieces (held at the documented default)
- Total sheet metal blanks processed: 250 pieces (held at the documented default)
- Shop yield target: 68 % (the input this scenario stresses; the baseline uses 95)
Working through the calculation
- The calculation starts from the formula this tool documents: Duct sheet yield = accepted pieces รท total pieces processed.
- Rate works out to 93.2 % at these inputs, and this is the headline figure for the scenario.
- Gap to target works out to -25.2 points at these inputs.
- Affected count works out to 233 count at these inputs.
- Total count works out to 250 count at these inputs.
How this compares with the baseline
- Against the tool's baseline example, where shop yield target sits at 95% and the headline result is 93.2 %, this scenario lands almost exactly on the baseline at 93.2 %.
- Use it during a production run or shift review to gauge how efficiently sheet stock is converting to accepted duct sections. A result at this level usually justifies acting on the stressed input before touching anything else, because every other figure in the table is downstream of it.
Results at a glance
- Rate: 93.2 % (headline result)
- Gap to target: -25.2 points
- Affected count: 233 count
- Total count: 250 count
Run it with your numbers
- To rerun this with your own numbers, open the live Duct Sheet Yield calculator, set shop yield target to your actual value, and adjust the remaining inputs to match your operation.
Last reviewed 2026-05-12.