Subject 1 · First subject free

Flow visibility and data quality

Trace the order by identifier through dated events, locations and owners. Separate the movement of goods from confirmation and commitment; a missing event alone does not prove a lost shipment. Item identity, unit and status definitions precede quantity comparison; distinguish arrived, accepted and promiseable stock. State the order population, inclusion rule and denominator before calculating a rate. Count the joint successes directly rather than multiplying separate rates. Separate verified event, hypothesis and temporary decision. An absent scan does not prove lost goods, and resolving customer impact does not prove root cause.

Read the whole first subject without an account: its lessons, summary and review questions.

Subject lessons

  1. Lesson 1 Map order and material flow 5 min read
  2. Lesson 2 Define items and operational records 5 min read
  3. Lesson 3 Measure order service with valid denominators 5 min read
  4. Lesson 4 Investigate exceptions from event records 5 min read
  5. Integrated subject summary Review questions

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