TESTING - Quality Principles

What is Quality?

- Meeting the customer’s requirements in the first time and every time.

Five Perspectives of quality:

· Transcendent – I know when I see it.

· Product based – Possesses desired features.

· User based – Fitness for use.

· Development and manufacturing based – Confirms to requirements.

· Value based – At an acceptable cost.

Quality in Fact – Customer’s View:

- Doing the right things.

- Doing the right way.

- Doing it right first time.

- Doing it on time.

Quality in Perception – Supplier’s View:

- Delivering the right product.

- Satisfying the customer’s needs.

- Meeting the customer’s expectations.

- Treating every customer with integrity, courtesy and respect.

Why Quality?

- A way to achieve improved productivity and competitiveness in any organisation.

Cost of Quality:

- Two Components must be considered – RTF (Right the First Time) and Cost of Quality.

- RTF Costs includes labour, materials and tools associated the actual development of the application.

- Cost of Quality includes Prevention cost, Appraisal cost and Failure cost.

Cost of production = RTF + Cost of Quality

RTF Cost = Cost of labour, materials, tools, etc.

Cost of Quality = Prevention Cost + Appraisal Cost + Failure Cost

Quality Assurance Vs Quality Control:

- Quality Assurance is the planned and systematic set of activities necessary to provide adequate confidence the products and services will conform to specified requirements and meet user needs.

- Quality Control is the process by which product quality is compared with applicable standards and the action taken when non-conformance is detected.

Quality Control:

- Relates to specific product or service.

- Verifies whether specific attribute(s) are in or are not in a specific product or service.

- Identifies defects for primary purpose of correcting defects.

- Responsibility of the team/worker.

- Concerned with a specific product.

Quality Assurance:

- Helps in establishing processes.

- Sets up measurements program to evaluate processes.

- Identifies weakness in processes and improves them.

- Management responsibility frequently performed by a staff function.

- Concerned with all of the products that will ever be produced by a process.