Quality: The whole of specific property and performance to be the object of a valuation for determining whether a service is satisfying its purchaser.
Quality control: It is an integrated system that permits economical production and supply of products to meet the requirements of users.
Objects of quality control:
- To produce a standard of product that is satisfactorily accepted by the purchaser.
- During production, the deviations of the quality parameters are analyzed to find out the causes of deviation.
- The corrective action should be taken if the product does not possess the demand.
- Purchaser demand should be targeted.
- Producing and offering the product at minimal manufacturing cost
Quality characteristics:
- Raw cotton: suitable length, fineness, strength and twisting capacity, etc.
- Yarn: count, strength, TPI, evenness, [U%, C.V%, imperfection (thick places/1000m + thin places/1000m + neps/1000m)], hairiness, etc.
- Fabric: dimension (length+ width+ thickness), density (EPI+PPI), strength, GSM, dimensional stability, fastness, abrasion and pilling, spirality, etc.
- Garments: size, style, color, comfortness, hygienic condition, ironing, packaging, labeling, etc.
- Online quality control
- Off line quality control
Online quality control: Without stopping the m/c or process quality of any product is maintained. e.g.:
- Sliver and roving hank variation is controlled by auto leveller.
- Yarn fault rectified by auto coner.
- Yarn tension controlled by automatic tension compensating device shade variation by color dispenser.
Off-line quality control: Quality is controlled by stopping the m/c. e.g.: Count, TPI, CSP and Evenness (U%, C.V%, imperfection) test, etc.
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