Resource Calculations: Effort, Duration, and Capacity is a free illustrated PDF handbook for project managers who need to turn work estimates and resource availability into practical staffing and scheduling decisions. It separates the hours a task needs from the working time it takes, then shows how calendars, assignment levels and specialist skills change the result.
The pages use a consistent handwritten notebook style, with clear formulas, worked examples and notes about when each calculation applies. Each example states its assumptions so that readers can adapt the method to their own project without treating a simplified calculation as a guaranteed delivery date.
What you will find in this ebook
Estimate effort and calculate available capacity
Start with person-hours, person-days and bottom-up effort estimates. Calculate the hours available from one person and from a team, allowing for leave, other commitments and different working calendars. Learn to distinguish headcount from full-time equivalent, and avoid deducting the same unavailable hours twice.
Turn resource assumptions into a feasible plan
Use worked calculations to estimate task duration, determine required staffing and accumulate capacity when availability changes. Compare assignment demand with available hours, identify overloaded periods and test whether a specialist role creates a bottleneck even when the team total looks sufficient.
Update forecasts and compare recovery options
The later pages explain accepted-output productivity, fresh estimates of remaining effort, overtime assumptions and capacity scenarios. A complete case brings the methods together around an eight-day target, followed by a formula checklist and links to supporting Microsoft documentation.
How to use the handbook
Choose a calculation that matches your question, write down its units and define the time period. Substitute your own effort estimate, working hours and assignment levels into the example. Then check the result against actual calendars, required skills and task dependencies before committing to dates or staffing.
Keep the handbook beside your resource plan when reviewing weekly demand or discussing availability with resource owners. Revisit the remaining-work calculation at each status date instead of assuming that hours already spent always represent completed scope. The PDF is a reference guide; it does not calculate automatically or replace a detailed project schedule.
Who this ebook is for
This guide is useful for project managers, planners, team leads, PMO analysts and learners who want straightforward resource calculations. It is especially relevant when a team is shared across projects, people have different availability, or a deadline requires a transparent staffing estimate.
Inside the PDF
The download contains 21 pages: one cover, 18 numbered content pages and two advertisement pages. The templates advertisement follows content page 5, and the Coursera Plus advertisement follows content page 15. The PDF includes navigation bookmarks and clickable promotional and source links.
View the complete contents
- Effort, duration and capacity
- Keep the units consistent
- Build the effort estimate
- Calculate individual capacity
- Add up team capacity
- Headcount and FTE
- When capacity changes
- How many people are needed?
- Allocation and utilization
- Find workload conflicts
- Find the skill bottleneck
- Level competing assignments
- Use productivity carefully
- Forecast the work remaining
- Overtime and extra capacity
- Test capacity scenarios
- Put the calculations together
- Your formula checklist
Related project management ebooks
For a wider formula reference, read Essential Project Management Formulas. For task timing and dependencies, explore Project Scheduling Calculations. To connect planned work with budgets, use Cost Estimation and Budgeting Formulas, or review Earned Value Management for performance measures.
Browse all free WikiFree ebooks.
Frequently asked questions
Does adding more people always shorten the task?
No. The simple duration formula assumes shareable work, suitable skills and usable availability. Dependencies, handoffs and specialist bottlenecks can prevent extra people from reducing the finish time. The examples explain these limitations.
Is this resource calculations PDF free to download?
Yes. You can download the PDF directly from this page without creating an account. It is an English-language handbook with worked examples, rather than an editable spreadsheet or scheduling application.
Does the handbook contain advertisements?
Yes. It includes a project-management templates advertisement and a Coursera Plus advertisement. Their links are optional, and you do not need to purchase either offer to use the handbook. Promotional links may generate a commission for WikiFree.