Production, Lean and Inventory

These tools cover shop-floor pace and stock. OEE, takt time, cycle time, lead time and kanban describe how fast a line runs against demand, MTBF measures reliability from failures, and EOQ and safety stock work out how much to order and how much to hold.

Tools in this group

• Cycle Time Calculator — Work out average cycle time, the bottleneck of a process from its step times, or lead time, WIP and throughput with Little's Law.
• EOQ Formula and Calculator (Economic Order Quantity) — Enter annual demand, the cost per order and the holding cost to get the economic order quantity, the annual costs and the reorder point.
• Kanban Formula and Calculator — Enter demand, waiting and processing time, a safety factor and the container quantity to get the number of kanban cards for the loop.
• Lead Time Calculator — Add up the stages between placing an order and having the goods in stock to get the total lead time, expected delivery date and reorder point, or measure the average lead time from your past orders.
• MTBF Calculator (Mean Time Between Failures) — Enter operating hours and failures, or a failure rate or FIT value, to get MTBF, MTTR, availability and the chance of running without failure.
• OEE Formula and Calculator — Enter planned production time, downtime, ideal cycle time and the total and good counts to get availability, performance, quality and OEE.
• Safety Stock Formula and Calculator — Choose a method, enter your demand, lead time and service level, and get the safety stock and the reorder point.
• Takt Time Calculator — Enter shift length, breaks, shifts and customer demand to get the takt time, and add the work content to see how many stations you need.