Agile is an iterative project management and product development methodology. It is built on four core values and twelve guiding principles. Agile teams deliver work in short cycles called sprints. They collect customer feedback continuously and adapt their plan for each new cycle. In Six Sigma and Lean contexts, Lean Agile combines Agile’s iterative delivery with Lean’s waste elimination philosophy. Teams gain the speed to adapt and the discipline to cut non-value-added steps at the same time.
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Meaning of Agile
Agile is an iterative approach to project management and product development. Teams deliver work in short cycles, collect continuous customer feedback, and adapt priorities based on what they learn. The Agile Manifesto — published in 2001 by 17 software developers — defines four core values and twelve principles that guide all Agile practice.
Common Agile frameworks include Scrum (fixed-length sprints), Kanban (continuous flow with WIP limits), and Lean Agile (Agile delivery combined with Lean waste elimination). In Six Sigma, Lean Agile accelerates continuous improvement cycles while maintaining quality and reducing waste.
Key Takeaways
- Agile is an iterative methodology. Teams deliver work in short cycles and continuously incorporate customer feedback. Agile prioritizes adaptability over fixed planning.
- The Agile Manifesto was published in February 2001 by 17 software developers at Snowbird, Utah. It defines four core values and twelve guiding principles for adaptive, customer-focused development.
- The four Agile values are: individuals and interactions over processes and tools; working software over comprehensive documentation; customer collaboration over contract negotiation; responding to change over following a plan.
- Common Agile frameworks include Scrum (time-boxed sprints, defined roles, four ceremonies), Kanban (visual workflow, continuous flow, WIP limits), and SAFe (Scaled Agile Framework for large organizations).
- Lean Agile combines Agile’s iterative delivery with Lean’s waste elimination principles from the Toyota Production System. Lean operates at the system level; Agile operates at the team level.
- Six Sigma uses the DMAIC framework — Define, Measure, Analyze, Improve, Control — to reduce defects through statistical tools. Agile uses sprints and retrospectives to deliver value and adapt quickly.
- Agile and Six Sigma are not competing methodologies. Many organizations run Agile sprints for delivery and DMAIC projects for quality improvement — using each where it fits best.
What Is Agile?
Agile is a philosophy and set of practices for managing work. It prioritizes flexibility, customer collaboration, and continuous delivery of value. Teams divide work into small, manageable cycles. Each cycle produces a deliverable. Stakeholders review it and provide feedback. Teams use that feedback to adjust the plan for the next cycle.
Agile emerged as a response to the Waterfall model — a traditional, sequential project management approach. Waterfall required teams to lock in all requirements upfront, complete each phase in sequence, and deliver a final product months or years later. By the time the product shipped, customer needs had often changed significantly.
Agile solves this by shortening feedback loops. Instead of delivering once at the end, Agile teams deliver frequently throughout the project. Instead of freezing requirements at the start, they welcome changes at any stage — even late in development.
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The Agile Manifesto: Four Values and Twelve Principles
Every Agile framework rests on the Agile Manifesto, formally titled the Manifesto for Agile Software Development. Seventeen software developers published it on February 11-13, 2001, after a two-day retreat at The Lodge at Snowbird ski resort in Utah. They called themselves the Agile Alliance. The document is publicly available at agilemanifesto.org.
The Agile Manifesto does not prescribe specific tools or processes. It establishes a mindset through four core values and twelve supporting principles.
The Four Core Agile Values
The Manifesto states that while both sides of each pairing carry value, the left side takes priority:
- Individuals and interactions over processes and tools
- Working software over comprehensive documentation
- Customer collaboration over contract negotiation
- Responding to change over following a plan
These four values shift focus from rigid structure and documentation toward human collaboration and adaptability. Teams that embrace these values design processes around people and outcomes — not compliance checklists.
The Twelve Agile Principles
The Agile Manifesto supports its values with twelve principles that guide implementation:
- Deliver valuable software early and continuously to satisfy the customer.
- Welcome changing requirements, even late in development.
- Deliver working software frequently — shorter cycles are preferred.
- Business people and developers must collaborate daily throughout the project.
- Build projects around motivated individuals. Give them support and trust them.
- Face-to-face conversation is the most effective communication method.
- Working software is the primary measure of progress.
- Maintain a sustainable, constant development pace — indefinitely.
- Continuous attention to technical excellence and good design enhances agility.
- Simplicity — maximizing the work not done — is essential.
- Self-organizing teams produce the best architectures, requirements, and designs.
- Teams regularly reflect on how to improve, then adjust their behavior accordingly.
These principles originated in software development. Today teams apply them in manufacturing, healthcare, marketing, finance, and operations — anywhere iterative work and continuous improvement matter.
Also Read: Large Scale Scrum: How to Scale Agile Without the Bloat
Common Agile Frameworks
The Agile Manifesto defines values and principles. Agile frameworks define the specific roles, ceremonies, and practices that teams use to act on those principles. The three most widely used Agile frameworks are Scrum, Kanban, and SAFe.
Scrum
Scrum is the most widely adopted Agile framework globally. It organizes work into fixed-length cycles called sprints — typically one to four weeks. Each sprint produces a working, potentially releasable product increment.
Scrum defines three key roles:
- Product Owner — Represents the customer. Prioritizes the ordered product backlog.
- Scrum Master — Facilitates the team’s process. Removes blockers and protects focus.
- Development Team — A self-organizing, cross-functional group that executes the work.
Scrum teams run four ceremonies:
- Sprint Planning — The team selects backlog items to complete in the upcoming sprint.
- Daily Standup — A 15-minute daily check-in covering what was done, what is next, and what is blocking progress.
- Sprint Review — The team demonstrates completed work to stakeholders at the sprint’s end.
- Sprint Retrospective — The team reflects on the sprint and identifies improvements for the next one.
Kanban
Kanban manages work through continuous flow rather than fixed-length sprints. Teams visualize all work on a Kanban board — a grid with columns representing stages (To Do, In Progress, Done) and cards representing individual tasks.
Kanban’s defining feature is the Work-In-Progress (WIP) limit — a maximum number of tasks allowed in each stage simultaneously. WIP limits force teams to finish existing work before starting new work. This prevents bottlenecks and improves flow.
Kanban originated in Toyota’s manufacturing system as a visual signaling method. This Lean manufacturing origin makes Kanban a direct bridge between Agile delivery and Lean waste elimination.
SAFe — Scaled Agile Framework
SAFe (Scaled Agile Framework) applies Agile and Lean principles to large organizations. It coordinates multiple Agile teams through a shared planning rhythm called a Program Increment (PI) — typically 8 to 12 weeks long.
SAFe explicitly incorporates Lean principles: Lean portfolio management, Lean-Agile mindset, and value stream management. It is the most widely adopted enterprise Agile framework and directly connects Agile delivery with Lean systems thinking.
What Is Lean Agile?
Lean Agile combines Lean thinking with Agile delivery. It applies Lean’s waste elimination philosophy at the system and portfolio level. It uses Agile’s iterative delivery methods at the team level.
Lean originated in the Toyota Production System. Its core goal is to maximize customer value by eliminating waste — any activity, step, or resource that does not add value. Lean identifies seven categories of waste: overproduction, waiting, transportation, over-processing, inventory, motion, and defects.
Agile focuses on adaptive, iterative delivery at the team level through short cycles, continuous feedback, and self-organizing teams.
Lean Agile combines both:
| Layer | Approach | Primary Goal |
| System level | Lean | Eliminate waste and optimize flow across the value stream |
| Team level | Agile | Deliver value iteratively through sprints and continuous feedback |
| Continuous improvement | Both | Agile retrospectives + Lean Kaizen + Six Sigma DMAIC |
In a Lean Agile organization, portfolio management uses Lean thinking to prioritize the highest-value work and eliminate waste. Teams execute that work through Agile sprints. The combination delivers faster output with less wasted capacity.
Also Read: Crystal Agile Methodology
Agile vs Six Sigma: Key Differences
Agile and Six Sigma both drive continuous improvement. They address different problems with different tools.
Six Sigma uses the DMAIC framework to reduce defects and process variation. It relies on statistical analysis, hypothesis testing, and data collection. Six Sigma projects move through five defined phases with tollgate reviews between each. A project may spend several weeks in the Measure phase alone — just validating that the measurement system is reliable before collecting any data.
Agile uses short iterative cycles to deliver value and incorporate feedback. It prioritizes speed and adaptability over statistical rigor. A Scrum team ships something every one to four weeks and adjusts priorities for the next sprint based on what they learn.
The following table compares the two approaches:
| Dimension | Six Sigma (DMAIC) | Agile (Scrum / Kanban) |
| Primary focus | Reducing defects and process variation | Delivering value iteratively and adapting to change |
| Core framework | Define, Measure, Analyze, Improve, Control | Sprints, ceremonies, and backlog management |
| Data use | Statistical analysis, hypothesis testing, control charts | User feedback, velocity, defect counts, burn-down charts |
| Timeframe | Projects run 3 to 6 months with phased tollgate gates | Cycles run 1 to 4 weeks; delivery is continuous |
| Team structure | Black Belt leads; Green Belts support; process owner sustains | Self-organizing: Product Owner, Scrum Master, development team |
| Best suited for | Measurable defects and variation in repeatable processes | Uncertain requirements, evolving scope, product and software delivery |
| Output | Sustained process improvement with a documented control plan | Working product increments and a continuously updated backlog |
| Flexibility | Low within each phase; gates require defined criteria to pass | High; priorities change between every sprint |
When Agile and Six Sigma Conflict
Tension appears when teams try to force Six Sigma’s statistical rigor into a two-week Scrum sprint. It also appears when teams apply Agile’s “ship it” speed to a process that genuinely needs defect control. Each framework optimizes for different outcomes.
Use Six Sigma DMAIC when: The problem is measurable and repeatable — a production defect rate, a transactional error rate, or a process output that falls outside specification. DMAIC finds root causes and builds a control plan that holds.
Use Agile when: Requirements are uncertain, the solution is still emerging, or rapid iteration is the fastest path to a workable outcome — software features, new product development, or new service design.
When Agile and Six Sigma Work Together
Many organizations run both simultaneously. Agile handles delivery speed. Six Sigma handles quality depth. Common integration patterns include:
- A software development team runs Agile sprints to build and ship product features.
- A quality team runs DMAIC projects to investigate and reduce the defect types that surface in sprint reviews.
- The Agile retrospective provides qualitative insights that inform a DMAIC project’s Define phase.
- The Six Sigma control plan ensures that improvements from a DMAIC project survive after the Agile team moves to its next sprint.
How Lean Agile Applies in Six Sigma Contexts
Lean Agile complements Lean Six Sigma naturally. Both share the foundational commitment to customer value and continuous improvement. Several Lean Agile practices map directly to Six Sigma tools:
Kaizen events and sprints. A Kaizen event is a focused, short improvement effort — typically three to five days — that resembles a concentrated Agile sprint. Both focus a cross-functional team on a specific problem and produce a deliverable within a fixed time window.
Kanban boards and process control. Six Sigma teams use process maps, control charts, and dashboards to visualize process performance. Kanban boards visualize workflow and surface bottlenecks — a direct application of Lean waste identification. Many Six Sigma practitioners use Kanban to manage improvement project pipelines.
Voice of the Customer (VOC) and Agile feedback loops. Six Sigma’s Define phase captures the Voice of the Customer to establish Critical-to-Quality (CTQ) requirements. Agile sprint reviews and backlog grooming continuously incorporate customer feedback. Both ensure improvement effort targets what the customer actually values.
Sprint retrospectives and the Control phase. Agile retrospectives — where teams reflect on what worked and what to change — mirror Six Sigma’s Control phase, which prevents improvement gains from regressing. Regular retrospectives alongside a formal control plan strengthen both.
Agile Training and Six Sigma Certification
Six Sigma Green Belt and Black Belt practitioners increasingly work inside Agile organizations. Understanding Agile frameworks — specifically Scrum, Kanban, and Lean Agile — helps Six Sigma practitioners communicate with Agile teams, embed quality thinking into sprint cycles, and identify where DMAIC projects add value alongside iterative delivery.
At Six Sigma Development Solutions Inc, our Green Belt and Black Belt programs build the process improvement foundation that Lean Agile environments depend on. Practitioners learn to measure process performance, find root causes through data, and sustain improvements through control plans — skills that make them more effective in any organization, including Agile ones.
We offer Six Sigma training in three formats:
- Onsite training — Delivered at your organization, using your real processes and projects. Ideal for teams deploying Lean Agile alongside Six Sigma simultaneously.
- Live virtual training — Instructor-led online sessions with real-time interaction and practical exercises.
- Online training — Self-paced Yellow Belt, Green Belt, and Black Belt certification programs available on your own schedule.
Explore our Six Sigma training programs or contact our team to find the right program for your goals.
Frequently Asked Questions: Agile
Q: What is Agile in simple terms?
A: Agile is a way of managing work that delivers results in short iterative cycles, collects continuous customer feedback, and adapts the plan based on what the team learns. Teams deliver small, working increments frequently instead of one final product at the end of a long project. The Agile Manifesto — four values and twelve principles published in 2001 — guides all Agile practice. Scrum and Kanban are the two most widely used Agile frameworks.
Q: What are the four core values of the Agile Manifesto?
A: The four core Agile values are: (1) individuals and interactions over processes and tools; (2) working software over comprehensive documentation; (3) customer collaboration over contract negotiation; and (4) responding to change over following a plan. The Manifesto acknowledges value on both sides — but prioritizes the left side of each pairing.
Q: What is the difference between Agile and Lean?
A: Agile is a delivery methodology that uses iterative cycles, self-organizing teams, and continuous customer feedback to adapt quickly to change. Lean is a system-level philosophy from the Toyota Production System that maximizes customer value by eliminating waste across the entire value stream. Agile operates at the team level. Lean operates at the system and portfolio level. Lean Agile combines both: Lean for flow and waste elimination, Agile for iterative team-level delivery.
Q: What is the difference between Agile and Six Sigma?
A: Agile uses short iterative cycles to deliver value quickly and adapt to change. Six Sigma uses the DMAIC framework and statistical tools to identify and eliminate the root causes of defects and process variation. Agile suits uncertain requirements and evolving scope — product and software development. Six Sigma suits measurable, repeatable process problems with identifiable defects. Many organizations run Agile for delivery and Six Sigma for quality improvement at the same time.
Q: What is Lean Agile?
A: Lean Agile combines Lean thinking and Agile delivery. It applies Lean’s waste elimination principles at the organization and portfolio level — eliminating non-value-added steps and optimizing flow — while using Agile sprints and continuous feedback at the team level. SAFe (Scaled Agile Framework) and Kanban are the two most common Lean Agile frameworks. Both explicitly incorporate Lean principles alongside Agile delivery practices.
Q: What is Scrum and how does it relate to Agile?
A: Scrum is the most widely adopted Agile framework. It organizes work into fixed-length sprints (one to four weeks), defines three roles (Product Owner, Scrum Master, Development Team), and runs four ceremonies (Sprint Planning, Daily Standup, Sprint Review, Sprint Retrospective). Scrum is one way to implement Agile values and principles. Not all Agile teams use Scrum — Kanban, SAFe, and Extreme Programming (XP) are other Agile frameworks that apply the same underlying Manifesto values differently.
Q: What is Kanban and how does it differ from Scrum?
A: Kanban manages work through continuous flow rather than fixed-length sprints. Teams visualize all work on a Kanban board and enforce work-in-progress (WIP) limits on each workflow stage to prevent bottlenecks. Kanban has no prescribed roles, no sprint cycles, and no fixed ceremonies — unlike Scrum. Kanban originated in Toyota’s manufacturing system and aligns closely with Lean principles. It suits teams managing continuous, ongoing work streams rather than project-based delivery cycles.
Q: How does Agile connect to Six Sigma’s DMAIC framework?
A: Agile and DMAIC serve different purposes but complement each other. Agile retrospectives surface qualitative problems that can inform a DMAIC project’s Define phase. DMAIC’s Analyze and Improve phases add statistical rigor that sprint-based teams typically lack — confirming root causes before implementing solutions. DMAIC’s Control phase ensures that improvements delivered through Agile sprints do not regress over time. The combination uses Agile for speed and adaptability and DMAIC for depth and sustainability.
About Six Sigma Development Solutions, Inc.
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