Buying QC Job Interview Questions & Answers | ©AllaboutQMS

A. General Background about statistical control of delivery.

1. What you know about “Level of Inspection” and which level is generally used?
• Answer: Level of Inspection mean the different inspection levels; mentioned as below:
• Normal inspection (or level-II inspection): It is the default level, and it is chosen for 90%+ of inspections.
• ISO 2859 definition for “normal inspection”: “Normal inspection is used when there is no reason to suspect that the [quality level] differs from an acceptable level.”“Unless otherwise specified, level II shall be used. Level I may be used when less discrimination is needed or level III when greater discrimination is required.”
• Tightened inspection (or level-III inspection): more samples are checked. This inspection level is used for suppliers that recently had severe quality problems, or for high-value products.
• ISO 2859 definition for “tightened inspection”:“Use of a sampling plan with an acceptance criterion that is tighter than that for the corresponding plan for normal inspection.”
• Reduced inspection (or level-I inspection): fewer samples are inspected. This inspection level is appropriate when the client is confident that the quality of the products is acceptable.Note: it is never appropriate for a re-inspection following a refusal.
• ISO 2859 definition for “reduced inspection”:“The discriminatory ability under reduced inspection is less than under normal inspection.” There are also four other “special” inspection levels. They are used in cases where the inspector can only check very few samples. However, the risk of accepting products of bad quality is higher. For example: if the inspector has to do a very particular checking that takes him a long time per product (e.g. dismantling a radio system to see all the components, check the welding…). Another example: if a particular test ends up in the destruction of the product (e.g. undoing the stitching of a garment to check the cut pieces against the client’s patterns).
• ISO 2859 definition for “special inspection”:“Four additional special levels, S-1, S-2, S-3 and S-4 […] may be used where relatively small sample sizes are necessary and larger sampling risks can be tolerated.”
2. What does AQL mean?
• Answer: The acceptable quality limit (AQL) is the worst tolerable process average (mean) in percentage or ratio that is still considered acceptable; that is, it is at an acceptable quality level.
3. List 5 Major Defects generally found in garments?
• Answer: Needle Drop, Hole, Open Seam, Ply Missing, Uneven Twisting, Puckering, Needle Mark, Sleeve Up-Down, Seam Gathering, Linking Gap, Broken Ply, Wrong Mending, Spot/Dirty/Oil Mark, Visible Yarn Knot, Shoulder Pointy.
4. What is the definition of Minor Defects?
• A Minor defect is a discrepancy from the standards, but one that is not likely to affect the usability of an object.
• A Major defect is one that is likely to create failure of the unit for its intended purpose.
• A Critical defect is one that is deemed to be hazardous or unsafe.
5. List 5 Minor Defects generally found in garments?
• Answer:Uncut Thread, Knot, Loose Thread, Color Shading, Thick & Thin, Poor Neck Shape, Pull/Loop Yarn, Poor Trimming, Raw Edge visible.
6. What preparation you make/take before going to the factory for inspection?
• Answer:
7. You are in the factory and you have a final inspection to do; how you start? List the steps-
• Answer:
• Verifying Packing list comparing with P.O. sheet.
• Determining of lot size.
• Selecting of inspection severity level & sampling plan.
• Preparation of Inspection.
• Checking of carton.
• Selection of carton.
• Checking of Packing & packaging.
• Selection of sample randomly (sample packing).
• Checking of garments Sample.
• Checking of measurement (Dimension).
• Record and list all of the major or minor defects/defectives/non conformance.
• Tabulation and evaluation of results from this record.
• Drawing of defective sample for reference.
• Filling up of Carton (If samples are OK).
• Putting of Sticker & signature on carton.
• Preparation of Report.
• Conformation for the shipment.(For reference only)

A. AQL STANDARDS:

1. Delivery and Control level Concerning the delivery, you must indicate:
• The quantity of boxes in delivery.
• The quantity of boxes to be opened (See Table below)