Get Define Right and DMAIC Almost Runs Itself: A Practical Checklist
DMAIC has five phases — Define, Measure, Analyze, Improve, Control — and the order is not decorative. Define is first because everything downstream inherits its assumptions. When a Six Sigma project drifts, expands, or quietly dies, the autopsy almost always points back to a Define phase that was rushed: the problem was a slogan, the scope was a moving target, and nobody with budget authority had truly signed on. Tighten Define and the rest of the project gets dramatically easier.
That discipline matters more in disrupted conditions. In early 2021, with shifting demand and strained supply, the temptation is to launch improvement projects fast and broad. Broad is exactly the trap. Here is a checklist to get Define right before you touch the data.
Write a problem statement that survives scrutiny
State the problem in terms of a measurable gap — current performance versus required performance — not a proposed solution.
Anchor it to something the business feels: cost, cycle time, defects, safety, or a service level a customer notices.
Strip out causes and fixes. 'Invoices take too long because the system is old' presumes an answer; 'invoice approval averages eleven days against a target of five' does not.
Bound it in time and place: which process, which site, which date range.
Charter the project so it cannot quietly drift
Set scope with explicit in and out. Name where the process starts and ends — a simple SIPOC (Suppliers, Inputs, Process, Outputs, Customers) view forces this — and write down what you are deliberately not touching. Unwritten scope is the seed of scope creep.
Establish a baseline, even a rough one. If you cannot state today's performance with a number, you cannot prove improvement later. A defensible estimate now beats a perfect measurement never; Measure will refine it.
Define the customer and the CTQs. Identify who receives the output and translate what they care about into critical-to-quality characteristics you can measure. Improvement that the customer never notices is motion, not progress.
Name a sponsor with real authority. Secure someone who can free up people's time, remove roadblocks, and accept the outcome. A project without an empowered sponsor is a hobby; verify they have agreed to the problem statement, not just the idea of improvement.
Agree the goal and the timeline. State the target improvement and a realistic end date. A goal without a number is a wish, and a project without a horizon never closes.
Run a short tollgate review at the end of Define and refuse to move into Measure until the charter, baseline, scope, and sponsor are all genuinely in place. It feels slow. It is the opposite — every hour spent hardening Define saves days of measuring the wrong thing, analyzing a problem no one will fund the fix for, or improving a process whose owner never agreed it was broken.
If you are standing up improvement work and want the scoping and sponsorship to hold from the start, XNM's strategic advisory helps organizations frame the right problems and line up the authority to solve them.