Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Economic production quantity models for imperfect product and service
  with rework   When imperfect quality products are produced in a production process, rework
may be performed to make them become serviceable. In an inventory system, items
may deteriorate. Selling deteriorated items to customers will create negative
impact on corporate image. In this paper, two economic production quantity
(EPQ) models are proposed for deteriorating items with rework process. A single
production-rework plant system and a system consists of $n$ production plants
and one rework plant are considered. Approximated analytic results are obtained
and numerical examples are provided to illustrate the solution procedure.

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The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
1
The categories of this paper are: cs
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
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The categories of this paper are: gr-qc
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The categories of this paper are: quant-ph
28
The categories of this paper are: alg-geom
6
The categories of this paper are: astro-ph