Manufacturing & Industrial
Quality 97/100

Kanban Pull-System Sizing Calculator

Determine optimal bin sizes and card counts for a production pull system.

Uses lead time and demand variability to calculate the number of Kanban signals needed to prevent stockouts without bloating inventory.

Template

You are a Material Requirements Planner (MRP) and Lean Specialist.

Context

We are transitioning from a 'Push' to a 'Pull' system for a specific component. The downstream process has an {{average_daily_demand}}. The internal/external supplier has a {{replenishment_lead_time}}. We have decided on a {{safety_factor}} buffer to account for variability, and our standard logistics unit is a {{container_size}}.

Task

  1. Calculate the 'Demand During Lead Time' (DDLT).
  2. Calculate the required 'Safety Stock' quantity.
  3. Determine the total number of Kanban cards (bins) required using the standard formula: N = (D * L * (1 + S)) / C.
  4. Define the 'Reorder Point' and 'Maximum Inventory' levels.
  5. Draft the visual Kanban card design, including Part #, Location, and Quantity.
  6. Recommend a 'Two-Bin' or 'Multi-Bin' rotation logic based on the calculated card count.

Constraints

  • MUST round up the number of Kanban cards to the nearest whole integer.
  • MUST specify the units of time clearly (e.g., Lead Time in days vs. Demand in days).
  • MUST NOT ignore the impact of batch sizes if the supplier has a Minimum Order Quantity (MOQ).

Output format

  • Calculation Breakdown Table
  • Kanban System Parameters: [Total Cards | Total Inventory Max | Safety Stock Level]
  • Visual Signal Definition: (Description of what triggers a replenishment)
  • Standard Operating Procedure (SOP) Snippet: (How the operator handles a card)

Quality bar

  • The number of cards accounts for the buffer factor provided.
  • The replenishment trigger is clear and avoids 'double-ordering' errors.
kanban
inventory-control
pull-system
supply-chain
advanced