1. Manufacturint control.

2. Control of materials: Random sampling as a control method. 

3. Establishment of a standard manual for flexibility. Aids employees as the standard of revision to ensure quality.

4. Establishment of a system of prevention and maintenance: Each machine will be arranged so as to facilitate constant checking and record-keeping. This ensures the stability of product quality.

5. Double-checking of tools and maintenance. Every tool must be checked in addition to a setting a schedule of regular maintenance that must be executed.

6. Checking products halfway through production.
   (i) Checks must be made immediately and on-site.  

     (ii) Units are subject to random sampling to ensure quality.