10/90 Planning Rule

Overview

The 10/90 Planning Rule is a time management principle that emphasizes the dramatic time savings achievable through upfront planning. The rule states that spending 10% of your time planning can save 90% of the time required for execution.

The Core Principle

10 minutes of planning can save 2 hours (100-120 minutes) in wasted time and diffuse effort throughout the day.

This represents a 12:1 return on investment for time spent planning.

How It Works

Daily Application

• Spend 10 minutes the evening before or morning of planning your day
• This small investment saves up to 2 hours of inefficiency
• Results in more focused, productive work time

Project Application

• Dedicate 10% of total project time to upfront planning
• Can reduce execution time by up to 90% compared to unplanned approaches
• Prevents rework, missed requirements, and scope creep

Benefits of Strategic Planning

Clarity and Focus

• Know exactly what to work on and when
• Eliminate decision fatigue throughout the day
• Reduce time wasted on low-priority tasks

Efficiency Gains

• Batch similar tasks together
• Identify dependencies and optimal sequences
• Allocate resources (time, energy, tools) effectively

Stress Reduction

• Feel in control of your day
• Reduce anxiety about forgotten tasks
• Create realistic expectations for what's achievable

Planning Process

For Daily Planning (10 minutes)

1. Review calendar and commitments
2. List all tasks and priorities
3. Estimate time for each task
4. Sequence tasks logically
5. Identify potential obstacles
6. Build in buffer time

For Project Planning (10% of timeline)

1. Define clear objectives and deliverables
2. Break down into major phases and tasks
3. Identify resources and dependencies
4. Create realistic timeline
5. Anticipate risks and contingencies
6. Establish success metrics

Contrast with 90/10 Outcomes Rule

Note: This differs from the "90/10 Outcomes Rule" (which suggests 10% of actions produce 90% of results). The Planning Rule specifically addresses time investment in planning versus execution.

Research Support

Studies in project management and productivity consistently show:

• Projects with thorough planning phases complete faster
• Daily planning reduces reactive, firefighting work

Common Objections and Responses

"I don't have time to plan"

• This thinking creates the very inefficiency planning prevents
• 10 minutes of planning saves 2 hours—you can't afford NOT to plan

"Things change anyway, so why plan?"

• Planning creates a flexible framework, not a rigid script
• Easier to adjust a plan than to operate without one
• Plans help you recognize and adapt to changes faster

"Planning feels like procrastination"

• Effective planning is brief and action-oriented
• Should transition naturally into execution
• Creates momentum rather than delay

Tools and Techniques

Time Blocking

Use planning time to assign tasks to specific calendar slots

Priority Matrices

Employ Eisenhower Matrix or similar frameworks during planning

Task Breakdown

Decompose large projects into manageable chunks

Energy Mapping

Align task planning with personal energy patterns

Implementation Tips

1. Make it routine: Same time daily/weekly for planning
2. Keep it focused: 10 minutes for daily, don't overplan
3. Be realistic: Account for interruptions and unexpected tasks
4. Review and adjust: Evaluate whether plans matched reality
5. Iterate: Improve planning process based on outcomes

Scaling the Principle

• Weekly: 30-45 minutes planning saves 3-5 hours execution time
• Monthly: 2-3 hours planning saves 15-20 hours over the month
• Quarterly: Full day of strategic planning saves weeks of misdirected effort