Artículos de revistas
Economic design of an X chart for short-run production
Fecha
2009Registro en:
INTERNATIONAL JOURNAL OF PRODUCTION ECONOMICS, v.120, n.2, p.613-624, 2009
0925-5273
10.1016/j.ijpe.2009.04.012
Autor
HO, Linda Lee
TRINDADE, Anderson Laecio Galindo
Institución
Resumen
The aim of this paper is to present an economical design of an X chart for a short-run production. The process mean starts equal to mu(0) (in-control, State I) and in a random time it shifts to mu(1) > mu(0) (out-of-control, State II). The monitoring procedure consists of inspecting a single item at every m produced ones. If the measurement of the quality characteristic does not meet the control limits, the process is stopped, adjusted, and additional (r - 1) items are inspected retrospectively. The probabilistic model was developed considering only shifts in the process mean. A direct search technique is applied to find the optimum parameters which minimizes the expected cost function. Numerical examples illustrate the proposed procedure. (C) 2009 Elsevier B.V. All rights reserved.