CLT10

It is a multiple-choice exam delivered in the language of the certification program. Expect scenario-based items that describe a workplace situation and ask for the best interpretation, next step, or countermeasure. The official body publishes the current number of questions and any time limit on its website; confirm there before scheduling.

Difficulty comes from application, not trivia. Candidates who have led a kaizen event, built a value stream map, or managed a pull system usually find the scenarios familiar. Those who only read about Lean often struggle to choose between two plausible answers. Focus on why a tool fits a given condition rather than memorizing definitions.

A common approach is six to ten weeks of part-time study. Start with TPS fundamentals-takt, flow, pull, jidoka, heijunka-then practice value stream mapping on a real process. Move to waste and kaizen, then standard work and 5S, and finish with leadership, A3, and hoshin planning. End with scenario practice under time pressure.

Retake policies vary and are set by the certifying organization. Check its official website for the current retake window, any waiting period, and the fee that applies. Do not rely on secondhand reports. If a retake is allowed, use the score report to identify weak domains and rebuild those before rescheduling.

Three recur: confusing tools with principles (for example, treating 5S as housekeeping rather than a foundation for standard work), choosing the most aggressive answer in a leadership scenario instead of the one that respects people and process, and misreading metrics such as lead time versus cycle time. Slow down on questions that ask for the next step.

The exam is not a statistics test. You may need to interpret takt time, cycle time, lead time, WIP, and simple ratios, and to read a value stream map with inventory and processing times. You are not expected to run regression or design experiments. Practice calculating takt from available time and customer demand.

There is no universal experience requirement stated here, but the scenarios assume familiarity with a real process. Candidates who have observed a production or service flow, participated in a kaizen event, or maintained standard work find the questions more concrete. If you lack that exposure, simulate it with a process you know well.

Use them to expose reasoning gaps, not to memorize answers. After each set, write down why the correct option fits the principle and why the distractors fail. Group missed questions by domain and revisit the underlying concept. Short, repeated sessions with review beat long cramming.

The certifying organization's official website is the only reliable source for current fees, scheduling, question count, time limit, passing score, and retake terms. This page does not state those figures because they change. Verify them directly before you register or pay.