What is Quality Control (QC) in Lean.

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WHAT IS QUALITY CONTROL (QC)  ?

Quality Control (QC) is-

  • A procedure or set of procedures.  
  • To ensure a  product manufactured.
  • Also used for services performed In Service Industries.
  • Aim is to meet the customer requirements. 

QC means Quality Control whereas    QA meant for Quality Assurance.

  • To implement the quality control procedure as an effective QC program, an enterprise first decides which specific standards the product or service must meet. 
  • Then the extent of QC actions must be determined for example, the percentage of units to be tested from each lot.
  • Real data of the percentage of units that fail must reported to Management.
  • Managerial level must decide corrective actions upon failed product or services.
  • Defective units must be repaired or rejected or reused .
  • If too many unit failures or instances of poor service occur, a plan must be decided to improve the production or service process.
  • The QC process must be ongoing to ensure the Customer Satisfaction.



BENIFITS  OF QUALITY CONTROL PROGRAMME: 

Following are some benifits of implementation of Quality Control Programme-

  • Improvement in Quality. 
  • Improvement in Production .
  • Improvement of operating Eliciency
  • Improvement of Customer satisfaction.
  • Reduction in Production bottlenecks. 
  • Reduction in Inspection.
  • Reduction of Customer complaint.
  • Improvement in Quality Consciousness.
  • Reduction in Cost per Unit.

         


GRAPHICAL TOOLS FOR CONTINEOUS QUALITY IMPROVEMENT IN QC :

• Check Sheets

• Pareto Diagrams 

• Cause & Effect Diagram 

• Histogram

• Control Charts 

• Scatter Plots

• Flow Charts

• Box Plots


CHECK SHEETS:

Observations are recorded  in systematic manners as they happens which shows the specific trends.


PARETO DIAGRAMS:

These digrams shows problems in decreasing order so as to decide the priorities.These diagrams helps in Identification of the critical problems.Also helps in the identification of the problems which requires immediate actions.Pareto diagrams are also helpful in guiding the management to allocate the resources to solve the problems.


CAUSE & EFFECT DIAGRAM:

These diagram explores the possible causes of the problems and their effects on the Products and the Processes.Cause and effect diagrams are used for the Cause Enumeration, Dispersion Analysis and Process Analysis.


HISTOGRAMS: 

This diagram tells whether the process is centred around a target value, the degree of variation in the data & whether the data meets the specifications.It is the graphical display of the data.It is the analyzed study in detail and corrective action is initiated to improve the quality.


CONTROL CHARTS:

They are used to control & monitor a progress of an ongoing process. 


SCATTER PLOTS: 

These shares the relation between two variables. These diagrams are drawn between the two variables to depict the relation between them.This relation is studied to set or correct the controllable variable for achievement of the desired results.


FLOW CHARTS:

These charts shows the priorities events in a sequence.

Also called as Run Charts

These charts are drawn from the data which is repressenting the Quality Character as they occurs providing general trend and variability of process.Also called as Run Charts.


BOX PLOTS:

These diagrams shows the variability of the data with respect to the Set Values.

Deviation from the symmetry indicates the Skewness and tail length indicates the Kurtosis.


WHAT IS TOTAL QUALITY MANAGEMENT (TQM):

Total quality management (TQM) is 

  • The Contineous Process of detecting and reducing or eliminating errors in manufacturing.
  • Total quality management aims the involvement of the production process accountable.Process accountabilt meant for the overall quality of the final product or service. 
  • Ensuring that total employees involvement.
  • The zero defect Products and Processes.
  •  Streamlining of supply chain management.


Thus three themes of TQM are -

1. The Customer

2. The Process

3. The Employees.

Management is responsible for analyzing the process to improve continuously.

Top management envisions the strategy and creates the policy and Middle management works on it's implementations whereas the employees involves in the decision making process also.




Wait the next article for such interesting industrial and manufacturing Quality Management Terms  in short.





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Location: India

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