Where the quantity is not fixed, the calculation for each batch size or rate of production should be included.

在质量不是很固定的情况下，每个批次大小的计算或生产率应包含在内。

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So how to make decision of the order batch, order quantity, order period of the materials according to the production need direct influences on the economic benefit.

如何根据生产需要对材料的订货批量、订货批次及订货周期进行决策，将影响到企业的产品成本和经济效益。

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There shall be product ID card on both ends of package. Terms like product name, specification, color, quantity, manufacturer, production date, batch, etc. on the ID card for traceback in future.

需有产品标识单，按照产品名称、规格、颜色、数量、厂商、生产日期、批次编号等，以便追溯。

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