Quality defaults and work-in-process inventory

Article Abstract:

A study was conducted to examine the interactions between quality defaults and work-in-process inventory (WIP). A model was developed in which defects from one station can be detected only in the next station. The basic assumption was that defective item arrivals are Markovian, and that defective items are reworked or replaced by good ones. The results show that under general conditions, there will be an unlimited increase in the inventory between the two stations for any failure rate. The implications for the adoption of just-in-time inventory methods are discussed.

Manufacturing processes, Manufacturing

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Exponential smoothing models: means and variances for lead-time demand

Article Abstract:

The modules of inventory control software depend on exponential smoothing methods in forecasting the mean and variance of lead-time demand (LTD). Formulae are presented to find the mean and variance of the LTD safety stock determination.

Europe, Methods, Usage, Measurement, Inventory control software, Order/inventory/purchasing software, Lead time

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Analysis of a dual sourcing inventory model with normal unit demand and Erlang mixture lead times

Article Abstract:

An inventory model is set up with concurrent usage of two suppliers. The model is analyzed using several data sets for illustration.

Stochastic analysis

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