The A3 system is a means of describing a business process in a compact form. It was originally created by the Toyota Motor Corporation and was named for the paper size on which it was printed: A3 (11” x 17”). Toyota used the A3 methodology to help develop its famed Toyota Production System (TPS).

A3 Method


1) The decision of a carrier to give up or to discontinue service over a route. Railroads must k ICC permission to abandon routes. 2) As in the phrase "call abandonment". This refers to people who, being placed on hold in an incoming call, elect to hang up ("abandon") the call. Call centers monitor closely the "abandonment rate" as a measure of their inefficiency.

A method of classifying inventory items relative to their impact on total control. ABC typically uses movement and cost data to calculate the value of stock usage over the prior period, and uses the result as an element in ranking items under an 80/20 Pareto rule for cycle counting purposes. The group is divided into classes called A, B, and C (and sometimes D) with The A group represents the highest value with 10 to 20% by number of items. The B, C and D (if used) groups are each lower values but typically higher populations. Items with higher usage value are (the 20%) are counted more frequently. Specific bars to be used in setting ABC levels will vary by organization as they will impact the financial control applied to inventory and the level of effort spent counting.

ABC Classification

What does this all mean?

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