09 Planes MIL STD 105 Ejemplo

Understanding Military Standard 105 Sampling Plans

Introduction to Military Standard 105

• The discussion begins with an overview of Military Standard 105, which outlines acceptance sampling plans based on acceptable quality levels (AQL).

• This standard provides three sampling procedures: simple, double, and multiple sampling methods.

Steps for Implementing a Sampling Plan

• Key steps include determining the lot size and specifying the acceptable quality level, typically defined by upper management.

• Choosing the inspection level is crucial; Level 2 is commonly used as a general standard.

Utilizing Tables for Sample Size Determination

• Reference Table 12.6 in the textbook to find the code letter corresponding to the lot size.

• Depending on whether simple, double, or multiple sampling is chosen, different tables (12.7 for normal inspection, 12.8 for severe inspection, and 12.9 for reduced inspection) will be utilized.

Example Scenario of Acceptance Sampling

• An example illustrates a client requesting only high-quality lots from a supplier with a lot size of 6,000 units and an AQL of 0.4%.

• Using Table 12.6 reveals that for this lot size at Level 2 inspection, the code letter 'L' applies.

Sample Size and Acceptance Criteria

• For normal inspection using code 'L', a sample size of 200 units is selected randomly from the lot.

• Acceptance criteria state that if two or fewer defects are found in the sample of 200 units, the lot is accepted; otherwise, it is rejected.

Variations in Inspection Levels

• In severe inspection (Table 12.8), one defect allows acceptance while two or more lead to rejection.

• Reduced inspection (Table 12.9), requires only an examination of 80 units where one defect leads to acceptance but three or more result in rejection.

Handling Defects Found During Inspection

• If two defects are found during reduced inspection (which falls between acceptance and rejection thresholds), it necessitates reverting to normal inspection protocols.

• The correct procedure after finding two defective items would involve applying normal inspection standards again as per guidelines outlined in Table references.