Commissioning Schedule Calculator
Cx timeline from point count and system complexity.
About this calculator
This calculator builds a commissioning (Cx) labor estimate from Total BAS Points, using industry-standard hours-per-point benchmarks (0.75 hr/point for pre-functional checkout, 2.0 hr/point for functional performance testing, both scaled by a System Complexity multiplier of 0.7x/1.0x/1.5x for Simple/Standard/Complex systems) plus fixed percentages of that base for integrated system testing (8%) and documentation (18%), and a per-system seasonal testing allowance if Seasonal Testing is enabled. Total Points is the dominant driver of Total Cx Labor Hours because every phase except seasonal testing scales directly with it, while the Cx Agent Hourly Rate has no effect on the labor-hours total at all -- it only converts hours into a dollar figure (Estimated Cx Cost) after the hours are already fixed.
That separation matters when comparing bids: two commissioning agents quoting different hourly rates for the same building and point count will show identical Total Cx Labor Hours and Working Days, differing only in Estimated Cx Cost. Calendar Weeks pads Working Days by 30% for scheduling gaps and coordination delays before converting to a 5-day work week, so the calendar timeline always runs longer than the raw labor-hours math alone would suggest.
Inputs
Results
Total Cx labor hours
1,813
Working days
227
How to Use This Calculator
- Enter Total BAS points, Number of major systems, and System Complexity.
- Set Simple (CV systems, basic schedules), Standard (VAV, economizer), and Complex (lab, demand ventilation, chilled beams).
- Adjust Cx agent hourly rate ($), Seasonal Testing as needed.
- Review Total Cx labor hours and Working days.
- Use Calendar weeks and Pre-functional hours to inform your decision.
How the result changes with Total BAS points
| Total BAS points | Total Cx labor hours | Working days |
|---|---|---|
| 250 | 946 | 119 |
| 375 | 1,379 | 173 |
| 750 | 2,679 | 335 |
| 1,250 | 4,411 | 552 |
What each input means
- Total BAS points
- Total hardware + virtual BAS points to be commissioned.
- Number of major systems
- Count of major mechanical systems (AHUs, chillers, boilers, etc.) for integrated and seasonal testing.
- System Complexity
- Select system complexity level
- Cx agent hourly rate ($)
- Loaded hourly rate for commissioning agent labor.
- Seasonal Testing
- Whether to include heating/cooling seasonal verification visits
What each result means
- Total Cx labor hours
- Total commissioning hours including all phases.
- Working days
- Total working days (8 hours/day) for commissioning.
- Calendar weeks
- Estimated calendar weeks including scheduling gaps and coordination delays.
- Pre-functional hours
- Hours for installation verification, wiring checks, sensor calibration.
- Functional test hours
- Hours for sequence testing and functional performance verification.
- Integrated test hours
- Hours for whole-building integrated system testing.
- Documentation hours
- Hours for Cx reports, issues logs, and closeout documentation.
- Seasonal test hours
- Hours for heating and cooling season verification visits.
- Estimated Cx cost ($)
- Total commissioning labor cost at the specified hourly rate.
- Points per day
- Average productivity metric: points commissioned per working day.
How this is calculated
Worked example, using the default values
- Identify Input Parameters4 parametersTotal BAS points = 500, Number of major systems = 10, System Complexity = 1, Cx agent hourly rate ($) = 125 = 5 input(s) provided
- Calculate Total Cx labor hoursTotal Cx labor hours = preFunctionalHours + functionalHours + integratedHours + documentationHours +...1813 = 1813
- Calculate Working daysWorking days227 = 227
- Calculate Calendar weeksCalendar weeks60 = 60
- Calculate Pre-functional hoursPre-functional hours = totalPoints * preFunctionalHoursPerPoint375 = 375
Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.
Frequently Asked Questions
What has the biggest effect on the commissioning timeline?
Total BAS Points. Every commissioning phase except seasonal testing -- pre-functional checkout, functional performance testing, integrated system testing, and documentation -- is computed as a rate times Total BAS Points (adjusted by the System Complexity multiplier), so the point count drives Total Cx Labor Hours and Working Days more than any other input.
Does the hourly rate change how long commissioning takes?
No. The Cx Agent Hourly Rate only converts the already-computed labor hours into a dollar figure (Estimated Cx Cost) -- it never appears in the Total Cx Labor Hours, Working Days, or Calendar Weeks calculations. Two agents quoting different hourly rates for the identical building and point count will show the same timeline, only a different total cost.
Why are calendar weeks longer than working days divided by five?
Calendar Weeks adds a 30% buffer to Working Days before dividing by a 5-day work week, to account for scheduling gaps, trade coordination, and retesting that a raw labor-hours calculation doesn't capture. That buffer is why the calendar timeline always runs noticeably longer than working days alone would suggest.
How much does system complexity change the labor estimate?
System Complexity applies a multiplier to the pre-functional and functional testing hour rates: 0.7x for Simple (constant-volume, basic schedules), 1.0x for Standard (VAV, economizer), and 1.5x for Complex (lab pressurization, chilled beams, demand ventilation). Moving from Simple to Complex at the same point count roughly doubles the pre-functional and functional testing hours (0.7x to 1.5x is a 2.14x jump), which is the single largest lever in this calculator besides point count itself.
What does seasonal testing add to the schedule?
When Seasonal Testing is enabled, the calculator adds 8 hours per major system, scaled by the same System Complexity multiplier, to cover a heating-season and cooling-season verification visit. That allowance is driven by Number of Major Systems, not by Total BAS Points, so a building with many points on few systems gets a smaller seasonal addition than one with the same points spread across many systems.
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