Workforce productivity: preserve the outsourcing boundary
Revenue per employee can rise after outsourcing even when the same work requires more total labor. The company has changed who employs the workers, not necessarily how efficiently the activity is performed. Preserve the production boundary before treating a lower payroll headcount as evidence of improved workforce productivity.
Distinguish a company ratio from a productivity measure
The BLS describes labor productivity through output and hours worked, and distinguishes it from measures using broader combinations of inputs. A company’s revenue divided by employees is a different statistic. Revenue can change with prices and business mix, while headcount can omit contractors and differ from full-time-equivalent labor.
For the original worksheet below, choose one defined production activity and include only internal and external hours performing that activity. This extended boundary is an analytical convention, not a recreation of an official BLS series. Do not add every supplier’s hours across the value chain or count an outsourced hour again inside internal labor.
A hypothetical outsourcing comparison
Assume a fictional factory produces 100,000 acceptable units annually with revenue of ten million. It initially employs an average 100 production workers, each working 1,800 hours, with no outsourced labor in the defined activity.
Next year it employs 80 such workers and purchases 40,000 external production hours. Revenue and acceptable output are unchanged. Assume hours are compatible and there is no material shift in product complexity.
| Hypothetical measure | Before | After |
|---|---|---|
| Internal hours | 180,000 | 144,000 |
| External hours in the same activity | 0 | 40,000 |
| Total activity hours | 180,000 | 184,000 |
| Revenue per internal employee | 100,000 | 125,000 |
| Output per total activity hour | 0.5556 | Approximately 0.5435 |
Revenue per employee rises 25%, while output per comparable total hour falls approximately 2.17%. This is not evidence that outsourcing always reduces efficiency. It demonstrates that the employee-only ratio cannot answer the broader productivity question when the employment boundary changes.
Keep costs and physical efficiency separate
The external service could still cost less despite requiring more hours. Labor rates, benefits, scheduling and supplier margins matter. Conversely, higher output per hour need not lower cash cost if specialist wages increase. Use a separate cost panel for internal compensation, external charges and transition costs rather than calling every favorable number productivity.
Avoid estimating exact contractor hours by dividing a supplier invoice by an assumed wage. The invoice can include equipment, supervision, insurance, margin and other services. If hours are unavailable, report the payroll-only ratio with its boundary limitation and test a clearly marked range for external input.
Match time and quality
Use average employment or actual hours for an annual comparison. A December headcount after a late-year reduction should not be treated as the number employed throughout the year. Check acquisitions, divestitures, part-time work and geographical transfers before interpreting a headcount change.
Count acceptable output, not merely units started. Rework or rejected products can consume external and internal time while making nominal production look stronger. If a supplier performs a different stage or delivers a different quality level, redefine the scope or keep the activities separate instead of forcing a misleading combined ratio.
Specify the observable test
Review when employee count falls while purchased services rise, when management reports large revenue-per-employee gains after outsourcing, or when contractor hours are omitted from a claimed automation benefit. The required evidence is the work transferred, the relevant external input and the output retained within the same boundary.
The output should show the employment boundary, internal hours, observable external hours, product scope, quality definition and unresolved input. It can distinguish a genuine process improvement from a reporting-boundary effect without asserting that private supplier data are known. This analysis does not decide whether outsourcing was strategically desirable or predict future employment.
FAQ
Is revenue per employee useless?
No. It can describe a consistently defined business. The problem is interpreting it as comparable physical productivity after prices, product mix or employment scope change.
Should every purchased service be converted to labor hours?
No. Include only compatible, evidenced labor within the chosen activity. Preserve unobserved supplier inputs as limits rather than manufacturing an exact denominator.