man-year
C1/C2Formal, Technical, Business, Academic
Definition
Meaning
A unit of work measurement, representing the amount of work done by one person working for one year.
A unit used in project management, economics, and budgeting to estimate labour costs, timelines, and resource allocation by quantifying work in terms of a full year of one person's effort.
Linguistics
Semantic Notes
Despite containing "man", the term is considered gender-neutral in modern professional contexts as a standardized unit of measurement, though alternatives like "person-year" are sometimes used. It is a compound noun, always hyphenated.
Dialectal Variation
British vs American Usage
Differences
No significant difference in meaning or usage. Spelling is consistent.
Connotations
Neutral technical term in both varieties.
Frequency
Equally common in UK and US professional/technical contexts like project management, software development, and economic planning.
Vocabulary
Collocations
Grammar
Valency Patterns
[Number] + man-year(s) + [of + Noun Phrase (e.g., development, effort)]The project requires/needs/took + [Number] + man-year(s).cost/estimate/allocate + [Number] + man-year(s)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “Not applicable for this technical term.”
Usage
Context Usage
Business
Used in project proposals and resource planning: 'The software upgrade is budgeted for 15 man-years of developer time.'
Academic
Found in economics and sociology papers analysing labour productivity or historical projects.
Everyday
Virtually never used in casual conversation.
Technical
Core term in engineering, software development, and construction project management for estimating total effort.
Examples
By Part of Speech
verb
British English
- Not applicable as a verb.
American English
- Not applicable as a verb.
adverb
British English
- Not applicable as an adverb.
American English
- Not applicable as an adverb.
adjective
British English
- Not applicable as a standalone adjective. Used attributively in noun phrases: 'a 50-man-year project'.
American English
- Not applicable as a standalone adjective. Used attributively in noun phrases: 'a 50-man-year undertaking'.
Examples
By CEFR Level
- Not typically taught at this level.
- Not typically taught at this level.
- The report estimated the construction would need over twenty man-years of labour.
- How many man-years did your company allocate to research and development last year?
- The initial feasibility study was a significant undertaking, consuming nearly eight man-years of expert analysis before the proposal was drafted.
- Budget overruns occurred because the initial estimate of five man-years for the coding phase failed to account for the system's legacy architecture complications.
Learning
Memory Aids
Mnemonic
Think of a 'light-year' measuring distance; a 'man-year' measures work distance: the total ground one person can cover working for a year.
Conceptual Metaphor
WORK IS A MEASURABLE COMMODITY (it can be quantified, bought, and allocated in standardized chunks).
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid direct calque 'мужчина-год'. The correct translation is 'человеко-год' (cheloveko-god).
- Do not confuse with 'man-year' as an age descriptor (e.g., 'a 40-year-old man').
Common Mistakes
- Writing as two separate words ('man year').
- Using it as a plural for 'man' over years (e.g., 'He worked there for five man-years').
- Confusing it with 'man-hour' (1 man-year ≈ 2080 man-hours).
Practice
Quiz
In which context is the term 'man-year' MOST appropriately used?
FAQ
Frequently Asked Questions
In formal technical and business contexts, it is widely accepted as a standard, gender-neutral unit of measurement. However, some organisations and writers prefer alternatives like 'person-year' or 'work-year' to be more explicitly inclusive.
Typically, one man-year is based on a standard full-time work year, often calculated as 52 weeks × 40 hours/week = 2,080 hours. This can vary by country, industry, or company policy.
Yes. If a task takes 5 people 2 years, it is a 10 man-year task (5 people × 2 years). It is a unit for aggregating total effort, not for describing individual tenure.
They are closely related. An FTE of 1.0 represents one full-time worker. A 'man-year' (or person-year) is the work output of 1.0 FTE over one year. FTE is often used for headcount, while man-year is used for quantifying work volume or cost.