Description
Compare installed or accepted quantity with plan.
Construction bookkeeping distinguishes installed, accepted, credited and reworked quantities, as well as contractual cost and schedule conventions. A local variance or budget term can expose a gap without verifying work quality, payment entitlement or the project critical path.
Compare installed or accepted quantity with plan.
When to use this tool
Use Installed Quantity Variance when checking a supplied construction quantity, charge, record or schedule convention.
How to use the tool and how it works
- Enter plannedQuantity, installedQuantity, acceptedQuantity, useAccepted. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read countedQuantity, variance. Use the output convention below.
Compare installed or accepted quantity with plan. Require nonnegative plan/installed and accepted <= installed; countedQuantity selects accepted when useAccepted, otherwise installed; variance = counted-planned.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| plannedQuantity | Planned Quantity | Required. Finite number; minimum 0. |
| installedQuantity | Installed Quantity | Required. Finite number; minimum 0. |
| acceptedQuantity | Accepted Quantity | Required. Finite number; minimum 0. |
| useAccepted | Use Accepted | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| countedQuantity | Counted Quantity | Required. Finite number. |
| variance | Variance | Required. Finite number. |
{
"input": {
"plannedQuantity": 100,
"installedQuantity": 110,
"acceptedQuantity": 90,
"useAccepted": true
},
"output": {
"countedQuantity": 90,
"variance": -10
}
}Limitations and assumptions
- Acceptance is supplied metadata, not a verified inspection, completed scope or payment entitlement.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.
Alternative or Complementary methods
Use verified project records, a complete schedule and governing contracts; involve qualified construction, engineering or legal professionals for practical decisions.
References
Similar or alternative tools
- Installed Quantity Progress Share
Return installed progress relative to planned quantity.
- Rework Quantity Credit Gap
Return net installed quantity after rework and its credit gap.