How to plan resources across multiple projects
TL;DR
Planning resources across multiple projects requires visibility into shared capacity and priorities.
Teams must balance competing deadlines using realistic availability, not assumptions.
Effective multi-project planning focuses on tradeoffs, sequencing, and regular review.
Without explicit planning, conflicts and overload remain hidden until delivery is at risk.
Table of Contents
What multi-project resource planning means
Multi-project resource planning is the process of assigning people to multiple projects while accounting for shared capacity, overlapping timelines, and competing priorities.
It answers questions such as:
- Which projects can realistically run at the same time?
- Where are people overcommitted across projects?
- What needs to move if priorities change?
The goal is not to optimize every project individually, but to optimize delivery across the whole portfolio.
Why planning across projects is difficult
Planning becomes complex when:
- People contribute to more than one project
- Deadlines overlap
- Priorities shift frequently
- Work is planned in isolation by different teams
Without a shared view, conflicts are discovered late and resolved reactively.
What inputs you need
1. Active and upcoming projects
Include:
- Start and end dates
- Priority level
- Rough effort by role
- Key delivery milestones
Projects should be visible in one place.
2. Shared resource availability
Account for:
- Working hours per person
- Part-time schedules
- Time off and holidays
- Non-project commitments
This defines real capacity across all projects.
3. Clear priorities
When conflicts arise, priorities determine which work moves and which does not.
Step-by-step multi-project resource planning
Step 1: Create a single view of all projects
Bring all projects into one timeline so overlaps are visible.
Step 2: Assign resources across the timeline
Allocate people based on availability and role, not just project needs.
Step 3: Identify conflicts
Look for:
- People assigned to overlapping work
- Periods of sustained overload
- Projects competing for the same specialists
Step 4: Resolve conflicts through tradeoffs
Options include:
- Moving project timelines
- Re-sequencing work
- Reducing scope
- Reassigning resources
Step 5: Review and adjust regularly
Multi-project plans must be revisited as priorities change.
How to handle conflicts and tradeoffs
When conflicts occur:
- Make priorities explicit
- Decide which project wins and why
- Communicate tradeoffs clearly
- Avoid expecting people to absorb conflicts silently
Unresolved conflicts lead to burnout and missed commitments.
Common mistakes teams make
Teams struggle when they:
- Plan each project in isolation
- Assume full availability everywhere
- Ignore context switching costs
- Delay conflict resolution
- Treat plans as fixed commitments
Multi-project planning requires continuous adjustment.
Frequently asked questions
How many projects can one person realistically handle?
It depends on context switching and role complexity. Fewer parallel projects usually lead to better delivery quality.
Should teams dedicate people to projects full-time?
Where possible, yes. Dedicated allocation reduces overhead and conflict, but is not always feasible.
How often should multi-project plans be reviewed?
Most teams review weekly for near-term delivery and monthly for portfolio-level decisions.
Sources
PMI library: Multi-project resource planning
https://www.pmi.org/learning/library/resource-leveling-scheduling-projects-6007
Atlassian: Managing resources across projects
https://www.atlassian.com/work-management/project-management/resource-management
Harvard Business Review: Managing competing priorities
https://hbr.org/2018/06/managing-professional-services-firms
IBM: Project portfolio and capacity planning
https://www.ibm.com/topics/project-management