Method or Process.
1. During SQC, specifications are checked against their relevant Rules, sources and Kin Documents for validity. Any Rule violations are Defects. The density of Defects is used to judge the “Quality” of craftsmanship of the specification.
2. SQC includes the Defect-Detection-Process (DDP) and the Defect-Prevention-Process (DPP). Both are defined in detail in [GILB93]. When the DPP (Process-Improvement) is used the Scope goes beyond Quality-Control and extends to Quality-Assurance.
3. Traditionally, SQC does not pretend to judge the specifications in terms of their relevance or profitability in the real world. It is primarily concerned with making sure that the specifications are clear, Complete and consistent by Checking a specification and any of its source and Kin Documents against Specification-Rules. It judges whether the specification is suitable to be used in subsequent Engineering or management Processes.
However, by using a different Type of Rules, Specification-Review-Rules, it is possible to extend the SQC Process to Checking the readiness of specifications for review. This could be for a business review or a technical review.
Before any SQC is carried out, informal Checking might be carried out by the Specification-Writer or by a colleague 
• SQC (a more formal team Process) is carried out by a group of people Checking the specification against Specification-Rules 
• If successfully SQC exited, further SQC can be carried out using Specification-Review-Rules. This is to Check the validity of entering a review Process by carrying out a number of pre-checks using the relevant Review-Criteria (Types of review include Architecture-Review and Business Review.) 
• If successfully SQC exited, a review can be carried out to decide on future actions 
This Concept entered by Adore Shuko.