Quality control

Presented by:

Akshita

Jyoti

Achieving Higher Quality Levels-- focusing on the Production System

Many times companies are tempted to spend more for higher quality

it must flow from a good process where quality is made a part of everyone’s Job

We must understand that tighter tolerances are a last resort that lead to non-linear extra costs and quality can be achieved through other means

We must analyze our products and processes to determine what factors actually lead to producing quality in the processes and get control of them

Quality control

Quality control (QC) is a procedure or set of procedures intended to ensure that a manufactured product or performed service adheres to a defined set of quality criteria or meets the requirements of the client or customer

Quality assurance

QA is defined as a procedure or set of procedures intended to ensure that a product or service under development (before work is complete, as opposed to afterwards) meets specified requirements. QA is sometimes expressed together with QC as a single expression, quality assurance and control (QA/QC).

7 Tools of Quality Control

Check sheets used to gather information on problem under investigation – where and how much

Pareto Diagram – the so called 80-20 chart used to identify the “vital few” that cause the most problems – helps to focus the improvement studies

Histogram – shows stratification in production

Scatter Diagram – used to identify relationships between variables

7 Tools of Quality Improvement

Flow Charts – describes, visually, the process under study. Allows teams to focus on problem areas and structural issues

Cause-and-effect diagrams – also called fishbone diagrams relates relationships between various factors influencing the problem under study.

Control Chart – charts of SPC to that assess status of the problem under study.

Flow chart

Finished product inspection

In- process checks

Achieving Quality

Inspect EARLY and often –make it part of each operators Duties

An operator is both a Customer of incoming quality as well as a supplier of down-stream quality – they have a vested interest in a better quality level

Never rest until its perfect! – which it can never be since the targets keep moving.