🎓 CSSBB Quest › Section IV

Section IV — Define Phase ~13%

Define carries 20 of the 150 scored questions. The 2022 BoK splits it into four parts: voice of the customer, business case and project charter, project management tools, and analytical tools. Define is where the project is scoped, the business case is made, and the team is chartered. It’s also the first DMAIC tollgate — the project doesn’t move to Measure until the Champion accepts the charter, the VOC is translated to CTQs, and the process is mapped at a high level.

Define phase deliverables

Deliverable	What it is	Common gap the BB must address
Project charter	One-page contract: business case, problem statement, SMART goal, scope, team, timeline	Goal statement that describes an activity (“investigate the process”) instead of an outcome (“reduce defect rate to ≤1%”)
VOC data	Raw customer feedback (surveys, complaints, interviews, focus groups)	Only internal data used — no actual customer input
CTQ tree	Translates VOC needs into measurable specifications (Customer Need → Driver → CTQ → Spec)	CTQ without a specification value (e.g., “on-time delivery” instead of “≥ 98.5% on-time”)
SIPOC diagram	High-level map: Suppliers, Inputs, Process (typically about 5–7 high-level steps), Outputs, Customers	Process steps too detailed (keep it high level at Define; save detailed maps for Measure); starting too far upstream or downstream
Stakeholder analysis	Map of who is affected, their power/interest, and how to engage each group	Missing a key stakeholder who later blocks the solution

VOC → CTQ translation

The exam tests whether you can tell a VOC statement from a CTQ specification. The translation has three levels:

VOC (raw need): “I want my orders delivered on time.”
CTQ driver: On-time delivery rate
CTQ specification: ≥ 98.5% of orders delivered within the agreed delivery window

A useful test: a CTQ specification states a direction or target (≥, ≤, =), a number, and a unit. Without those, it’s still a need or driver, not a measurable requirement.

Scoping the SIPOC correctly

The SIPOC is deliberately high-level — typically about 5–7 process steps. A common mistake is writing a detailed process map at Define and then having nothing left for Measure. At the Define tollgate, the SIPOC just identifies the start and stop of the process, the primary inputs and outputs, and who the customers and suppliers are.

Project management tools

Define also covers the tools a BB uses to run the project: Gantt charts, work breakdown structures, RACI (responsibility) matrices, critical path, risk and communication plans, and tollgate (phase-gate) reviews with the champion or sponsor.

Analytical tools: the seven management and planning tools

In the 2022 BoK these sit in Define (IV.D):

Affinity diagram: groups many ideas or VOC comments into natural themes
Tree diagram: breaks a goal into progressively more detailed tasks or requirements (the CTQ tree is one)
Process decision program chart (PDPC): anticipates what could go wrong in a plan and the countermeasures
Matrix diagram: shows the strength of relationships between two or more sets of items
Interrelationship digraph: maps cause-and-effect links among issues to find key drivers (most outgoing arrows) and outcomes
Prioritization matrix: ranks options against weighted criteria
Activity network diagram: sequences tasks and finds the critical path