1) Booking Procedure
Simply submit the informations about product such as po, specifications, and about supplier such as contact method. Please better make appointment with at least 3 working days prior to the required service date. With reference to the information given, our team will make a pre-quotation and upon receipt of your confirmation, our team will contact your supplier and arrange the service process accordingly. In the next day after the inspection completion, you will receive a detailed report together with digital photos.
2) ANSI Sample Tables
Table I: Sample size code letters
TableII: Single sampling plans for normal inspections (Master Table)
This is (a) any nonconformance from a customer's requirement (b) any attribute of a product or service that fails to meet specifications (c) any state of unfitness for use. Defects are usually cataloged into four types by degree, being very serious, serious, major and minor.
Defects detected during visual inspection are classified within 3 categories, "Critical", "Major" and "Minor" and the normal definitions are:
4)Acceptable Quality Level (AQL)
An AQL, or Acceptable Quality Limit, is a probability limit chosen for a given product or process characteristic. There are normally three limits chosen, one for critical, major and minor. Usually, each of these three limits is different for each category.
The lower the number, the fewer defects can be accepted in the sample of product. When choosing AQLs, it is important that one understands the balance between setting them too low, and rejecting many shipments, and setting them too high and releasing unacceptable product. Unless specified by the client, Sino-QC will adopt the AQL as follows:
Sino-QC recommends sampling tables to determine the number of units that will be randomly selected for evaluation. Based on the lot or batch size, code letters are assigned that cross-reference to the sample size required depending on which plan is being employed. Single normal sampling plans are the most commonly used.
Example of an Inspection:
· Product : Children wear
· Batch size : 15,000pcs
· Standard : Level II
· Sample size : 315 pcs
· AQL : Major: 2.5 & Minor 4.0
Acceptance number: 14pcs of Major & 21pcs of Minor which means either the Major defects exceed 14pcs or Minor defects exceed 21pcs or both are considered to be "Fail".