MaterialQuality

MaterialQuality

The Material Quality entity models the physical quality of the material. Typical examples are A-spec material, B-spec material, rework material and scrap material. The following definition is introduced by the Blom OEE standard v 2.0:

Producing ‘quality’ means producing a product that meets its specification, not by trying more than once but first time right. Products not meeting its full spec, but still useful and possible to sell (i.e. as B product, or in a different market) are not first time right and thus should be considered ‘scrap’

If a product does not meet its spec, but can be reworked, in terms of OEE it is to be considered as ‘scrap’, but can be identified as a special form of scrap, by labelling it as ‘rework’.

Material quality name

The material quality name is a textual name of the actual material quality. 

Material quality label

The material quality label is an alternative textual name of the actual material quality. 

Material quality id

The material quality id is a database generated serial number of the actual material.

Material Quality Class

The material quality class concept is used to classify the different material qualities in terms of material value. There are four material quality classes. These classes are used for KPI calculations such as OEE.

• Accepted. Material that is A-spec, or can be sold as B spec product.
• Rework. Material that has to be reworked in order to be sold as A or B spec product.
• Scrap. Material that cannot be reworked, and has to be considered 'scrap'
• Undefined. Material that has not been inspected or where the quality is unknown.

Every material quality belongs to one and only one material quality class.