I85PREP
⌘ K
CSOWM study materials
CSOWM study resources

CSOWM: Warehouse Operations and Materials Handling

CSOWM · Work through your exam, one topic at a time.

All guide sections

Warehouse Operations and Materials Handling

Warehouse operations and materials handling tests the end-to-end process from receiving to shipping, the choice of picking method, equipment selection, labor standards, and operational KPIs. Expect questions on wave versus waveless picking, batch versus zone picking, putaway, packing, and equipment trade-offs.

Core rules

  • Core flow: receiving, putaway, replenishment, picking, packing, staging, shipping. Each handoff adds time and error opportunity.
  • Picking methods: piece, case, and pallet. Batch picking collects multiple orders in one pass; zone picking divides an order across areas; wave picking releases work in scheduled groups; waveless releases continuously based on capacity.
  • Putaway should respect velocity, cube, and replenishment needs. Random storage can improve space use but raises travel unless the WMS directs intelligently.
  • Equipment choices include walkie/rider pallet jacks, reach trucks, order pickers, conveyors, sortation, AS/RS, and AGVs. Match equipment to throughput, cube, aisle width, and labor availability.
  • Labor standards should measure productive time and account for travel, search, and replenishment. Lines per hour and units per hour tell different stories.
  • Safety controls include pedestrian segregation, forklift training, load stability, dock restraints, and ergonomic design.

Worked example

Two pickers work an 8-hour shift with 30 minutes of breaks each, giving 15 productive hours. They pick 600 order lines containing 4,800 units. Line productivity = 600 / 15 = 40 lines per person-hour. Unit productivity = 4,800 / 15 = 320 units per person-hour. If a new slotting plan cuts travel by 10%, the gain shows up in lines per hour only if pick density and replenishment are held constant. Reporting only units per hour can hide a shift from small-piece to case picking.

Traps that cost marks

  • Comparing pick rates in lines per hour when one operation picks cases and another picks pieces.
  • Confusing batch picking with zone picking; batch collects orders, zone divides an order by area.
  • Ignoring replenishment and putaway labor when calculating picking capacity.
  • Choosing automation from headline throughput without cube, SKU profile, and uptime assumptions.
  • Measuring safety only with lagging indicators such as recordable incidents.