Gap Analysis: Bridging the Gap Between Current and Future State

Gap analysis is a core tool in Lean Six Sigma. It helps organizations identify performance shortfalls and create a clear path for improvement. Whether you want to reduce waste, improve cycle time, or boost quality, gap analysis will guide your strategy.

This article explains gap analysis from the ground up. You’ll learn what it is, why it matters, how to perform it, and how it connects with Lean Six Sigma principles.

What Is Gap Analysis?

Gap analysis compares the current state of a process or system to its desired future state. It highlights the difference—also known as the “gap”—between where you are and where you want to be.

In Lean Six Sigma, gap analysis is used to:

• Find inefficiencies
• Set improvement goals
• Prioritize actions
• Drive root cause analysis

The goal is to identify what prevents you from reaching your performance targets and then eliminate those barriers.

Example

Area	Current State	Desired Future State	Gap
Defect Rate	4.5% defects per million	1.5% defects per million	3% higher than desired
Lead Time	10 days from order to delivery	5 days from order to delivery	Lead time is twice the ideal
Inventory	40 days of stock on hand	15 days of stock on hand	Excess of 25 days of inventory

In each case, the gap defines the opportunity for improvement.

Why Gap Analysis Matters in Lean Six Sigma

Lean Six Sigma focuses on reducing waste (Lean) and minimizing variation (Six Sigma). Gap analysis aligns perfectly with both goals.

Here’s how:

Benefit	How Gap Analysis Supports It
Waste Reduction	Identifies non-value-adding activities
Defect Elimination	Pinpoints performance issues and root causes
Customer Satisfaction	Compares actual vs. expected service levels
Data-Driven Decisions	Provides a clear baseline for improvement
Continuous Improvement	Highlights areas for incremental gains

By highlighting gaps, teams know exactly what to fix—and why.

Types of Gaps in Lean Six Sigma

There are several types of gaps you might encounter. Understanding the differences helps you choose the right improvement strategy.

1. Performance Gaps

These are differences between current and target performance metrics.

Example: A call center averages 8-minute wait times, but the goal is under 3 minutes.

2. Process Gaps

These relate to missing or ineffective process steps.

Example: A manufacturing line skips a key inspection step, leading to rework.

3. Knowledge Gaps

When team members lack the training or tools to perform tasks effectively.

Example: Operators are unaware of standard work procedures.

4. Compliance Gaps

These refer to failures in meeting industry regulations or standards.

Example: A food processor falls short of HACCP audit requirements.

5. Strategic Gaps

These are mismatches between organizational goals and operational execution.

Example: A company wants to scale globally, but lacks systems for multi-site control.

When to Use Gap Analysis in Lean Six Sigma

Gap analysis can support any phase of the DMAIC cycle, but it’s especially helpful in the Define, Measure, and Analyze phases.

DMAIC Phase	Role of Gap Analysis
Define	Establishes the problem scope and desired outcomes
Measure	Quantifies the current state and identifies key metrics
Analyze	Highlights root causes of the gap between actual and target
Improve	Informs prioritization of solutions
Control	Tracks progress in closing the gap

By integrating gap analysis early, you create a roadmap for change that remains focused and measurable.

How to Conduct a Gap Analysis in Lean Six Sigma

A structured gap analysis follows a clear five-step process.

Step 1: Identify the Focus Area

Start by selecting a process, product, or metric that needs improvement. Focus on areas that directly impact quality, cost, or delivery.

Example: A plant wants to reduce downtime on its primary packaging line.

Step 2: Define the Desired Future State

Use benchmarks, customer expectations, or business goals to define what “good” looks like.

Example: The target is to reduce unplanned downtime from 12% to under 3%.

Step 3: Assess the Current State

Use data collection tools like time studies, check sheets, or dashboards. Identify the actual performance levels.

Example: Downtime analysis shows unplanned stoppages due to sensor failures and material jams.

Step 4: Identify the Gap

Compare the current and future states. Quantify the difference in measurable terms.

Metric	Current State	Future Goal	Gap
Downtime %	12%	3%	9% excess
MTBF (hours)	15	35	-20 hours
Changeover Time	90 minutes	45 minutes	45 minutes

Step 5: Analyze Root Causes and Prioritize

Use Lean Six Sigma tools to dig deeper. For example, Fishbone diagrams, 5 Whys, or Pareto charts can help uncover root causes.

Then, rank the issues by impact and ease of resolution.

Gap Analysis Tools and Templates

Several tools make gap analysis more effective. Below is a summary of the most useful options.

Tool	Purpose	Best Used For
SWOT Analysis	Assesses internal/external factors	Strategic gaps
SIPOC Diagram	Maps high-level process flow	Process and performance gaps
Fishbone Diagram	Identifies root causes	Any type of performance gap
Pareto Chart	Prioritizes problems by impact	Focused issue selection
Radar Chart	Visualizes performance vs. ideal	Comparing multiple metrics
Benchmarking	Compares against best-in-class performance	Defining future state goals

Example: Using a Radar Chart for Gap Analysis

Imagine comparing five process KPIs against your ideal targets:

Metric	Current Score	Target Score
On-Time Delivery	70%	95%
Defect Rate	3.5%	1.0%
Inventory Turns	6	12
OEE	58%	85%
Customer Returns	4%	1%

A radar chart would quickly highlight where you lag behind and where to focus.

Real-World Example of Gap Analysis in Lean Six Sigma

Let’s walk through a real-life example of gap analysis applied at a manufacturing company.

Background

A Tier 1 automotive supplier faced high rework costs in its stamping department. Leadership wanted to cut scrap and improve first-time yield (FTY).

Step 1: Focus Area

Rework rates on one stamping press averaged 12%. The goal was to lower this to 3%.

Step 2: Desired Future State

• FTY ≥ 97%
• Scrap < 2%
• Rework labor < 5 hours/week

Step 3: Current State

• FTY = 88%
• Scrap = 6%
• Rework labor = 22 hours/week

Step 4: Gap Identified

• 9% gap in FTY
• 4% excess scrap
• 17 hours of excess rework labor

Step 5: Root Cause Analysis

• 40% of defects were from tool wear
• 30% due to inconsistent material
• 20% from misaligned sensors

Solution

• Introduced predictive maintenance on tooling
• Changed material supplier
• Calibrated sensor alignment daily

Results After 3 Months

Metric	Before	After	Improvement
FTY	88%	96.5%	+8.5%
Scrap Rate	6%	2.1%	-3.9%
Rework Labor	22 hours	6 hours	-16 hours

This simple but structured gap analysis led to over $120,000 in annual savings.

Common Mistakes in Gap Analysis

Avoiding these pitfalls ensures your gap analysis leads to real results:

Mistake	Why It’s Harmful	What to Do Instead
Vague Future State	Leads to unclear goals	Use specific, measurable targets
Skipping Root Cause Analysis	Fixes symptoms, not problems	Apply tools like 5 Whys or Fishbone
Not Engaging Stakeholders	Limits buy-in and insight	Include operators and supervisors
Relying Only on Assumptions	Introduces bias and errors	Collect real data
No Follow-Up After Improvement	Gaps reappear over time	Monitor with control plans

Gap analysis isn’t a one-time fix—it’s a process.

Gap Analysis vs. Root Cause Analysis

Though similar, these two tools serve different purposes.

Feature	Gap Analysis	Root Cause Analysis
Focus	Difference between states	Source of the problem
Purpose	Highlight areas of weakness	Understand why the problem exists
Example Tool	Radar Chart, Benchmarking	5 Whys, Fishbone Diagram
Output	List of gaps	Root causes and contributing factors
Next Step	Prioritize improvement areas	Develop targeted solutions

In practice, gap analysis often comes first. Then, root cause analysis digs into the why.

Integrating Gap Analysis with Lean Tools

Gap analysis works well when paired with other Lean methods.

Lean Tool	How It Supports Gap Analysis
Value Stream Mapping (VSM)	Visualizes current vs. future process flow
5S Audit	Identifies workplace organization gaps
Standard Work	Exposes gaps in adherence to procedures
Visual Management	Makes performance gaps visible in real-time
Gemba Walks	Helps confirm and validate the gap in person

These tools help validate findings and ensure the gaps reflect reality.

Gap Analysis Template

Here’s a basic gap analysis worksheet you can use:

Focus Area	Current State	Desired Future State	Gap Identified	Root Cause	Action Plan
Lead Time	14 days	7 days	7 days	Bottleneck at QA	Add second QA shift
Rework %	9%	<3%	6%	Incorrect tooling	Train team + improve setup sheet
Inventory Days	40	20	20	Forecast inaccuracy	Improve demand planning process

Use this to document each gap clearly and align the team around improvement.

Conclusion

Gap analysis in Lean Six Sigma is more than a diagnostic tool—it’s a compass. It shows where you’re underperforming and directs your efforts where they matter most.

By identifying gaps early, you can:

• Reduce waste
• Improve efficiency
• Delight customers
• Achieve operational excellence

When combined with tools like DMAIC, VSM, and root cause analysis, gap analysis becomes a powerful driver of change.

Start by asking a simple question: Where are we now, and where do we want to be?

Then use the answers to build a better process—step by step.