A key concept of quality control is that all work productshave measurable specifications for process outputsare thoroughly tested before delivery to the customerare delivered on time and under budgethave complete documentation

A key concept of quality control is that all work products have measurable specifications for process outputs. This means that each product or service produced should have specific, quantifiable characteristics that can be measured to ensure they meet the desired level of quality.

For example, if a company is manufacturing a product, they might have specifications for the dimensions of the product, the materials used, the weight, etc. These specifications can be measured and compared to the desired specifications to ensure the product meets the required level of quality.

In addition, all work products should be thoroughly tested before delivery to the customer. This means that before a product or service is delivered to the customer, it should undergo rigorous testing to ensure it meets the required specifications and is free from defects.

Furthermore, all work products should be delivered on time and under budget. This means that the product or service should be delivered to the customer within the agreed upon timeframe and at the agreed upon cost.

Finally, all work products should have complete documentation. This means that there should be detailed records of the product's specifications, the processes used to create it, the testing procedures and results, and any other relevant information. This documentation can be used to trace the product's history, identify any issues or defects, and make improvements in the future.