Same diagram, four rounds. Name what each layer adds, then take the base flow below and build all four layers onto it, in order. Don't compute belt speeds. That's next lesson.
For each layer, write what gets added, and name one specific engineering decision that layer enables.
| Layer | What gets added | One decision it enables |
|---|---|---|
| Layer 1 | ||
| Layer 2 | ||
| Layer 3 | ||
| Layer 4 |
Here's the confirmed Layer 1 flow: two pick zones, a merge, the sort decision, three doors. Work down the four blocks below and add each layer's notes onto this diagram in order.
Layer 2 · Volume and rate
Split 20 CPM across the doors by Dana's percentages and note each section's rate. Flag the Zone A / Zone B split as an open item.
Layer 3 · Delays, assumptions, decisions
Mark the sort as a smart decision point. Write the three data questions at it. Note the unconfirmed WMS latency as an open item, not a fact.
Layer 4 · Buffers and people
Write buffer notes as measurable requirements. Mark the forklift crossing, the mezzanine landing, and where operators and maintenance need access.
Take the sort decision point and answer each question as far as your job at this stage allows. You're describing the decision, not designing the controls.