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Quality control




(a) Briefly explain how the quality improvement helps to grow a production or service
    organization.


   What is quality?
   Quality is about meeting the needs and expectations of customers

         1. Increase customer loyalty with that product or service organization

            Customers come again and repeat purchases again

            Customers recommend the product or service to others.
            Some customer after purchases if it has good quality he give good comments about it
            with his friend. It is big help to growing to business.


         2. Can build up good and strong brand reputation for quality

            if Any company has good brand reputation they can easily can increase them sells.

            Example: - Sony Company has god brand reputation for quality than other electric
            equipment companies. Because they doing lot of quality improvements for them
            product.




         3. Retailers want to stock the product

            Retailers are going to make stock mean production company can make big sales. It
            helps growing them business. Because they can do lot of investment form them
            money.




     1    Lasitha nawarathna
Quality control




    4. Any product or service has done quality improvements they perceived to be better
       value for money.
       It may commend a best price and will become price increase. But customers
       purchase it because they think higher quality of that product.

       Examples:-
       We can buy Benz car more than 20 million But we can buy Toyota car 5 millions
       .but some customs going to buy Benz car. Because they Benz product has better
       value for money and that brand also has higher value for money




    5. quality improvement help to make profitable business.

       Product or service has good quality improvements mean they have good market sale
       and market share and higher productivity/ efficiency and low production cost. That
       mean after the quality improvement processes any company can earn lot of profit. as

    6. higher the job security ,higher the job satisfaction
       Now we know quality improvement help to make profitable business. The part of
       profit goes All the employees of that company. Increase them bonus and they have
       lot of benefits those things help increase to job satisfaction and job security.




2    Lasitha nawarathna
Quality control


(b) As a manufacture, how could you achieve a good quality product through its design and
    production phases

              What is quality of design?

              Measure of how will be designed in product/ service to achieve the required
              product

              Product or service organization mainly follows two important quality concepts
                         Quality of designs
                         Quality of conformance to design


       1. Quality of designs
       Product or service organization measure how will be designed in product or service to
       achieve the required product



              How to achieve quality product though its design?

         I.      Normally designer collect data’s though the markets researches.
                 Researches gave data’s about obtain customers needs and what available now
                 in the market. Now designer can decide the best method. If any product
                 service can full fill customers requirements they can achieve higher sell and
                 can billed higher brand reputation.
        II.      Before decide final design designer have to consider man capacities of plant,
                 technologies are available.
       III.      Now designer decide actual specifications.
                 Following factors :-
                                           1.   Aesthetic characteristics
                                           2.   Performance characteristics
                                           3.   Obligatory regulations characteristics
                                           4.   environment factors important

       2. Quality of conformance to design
       Measures in what extent the product/service match with the design and customer
       actually receives should confirm to the design.
       Some time can depend on number of variables



  3   Lasitha nawarathna
Quality control


02. (a) Explain why collective application of quality inspection, quality control and quality
assurance need to ensure a good quality product or service



Quality inspection
    Inspection methods

       1. Final inspection
       2. Final and fixed intermediate                  Check 100%
       3. Final and faxable intermittent
          inspection


                                                        Check only
          4. Patrol inspection                          samples
          5. Centralized inspection




Advantages and purpose of Quality inspection:-

        To detect poor quality products and separate them from acceptable quality products and
       scrap, rework and sell them as second quality



       In this Quality inspection process we can identified defect.

       Don’t give any feed back to production process. After the inspected get a decision made
       whether accept or reject

       Disadvantages:-

            1. Late detection of defects,
            2. Higher cost of defective work
            3. poor access to production supervision
            4. scrap quantity higher

                Due this disadvantages Quality inspection not enough to maintain higher quality
                of the product.

      4    Lasitha nawarathna
Quality control




Quality control


     Main part of quality control:-

     Is quality inspection where the product was checked to ensure that it meet the customer
     requirements

     Quality control a process for maintain standards and not for creating standards

     Not like inspection gave the feed back to process to control / adjusts to minimize defects
     in future production .this is main advantage of quality control.

     Other advantages:-

             to increase the profit of business
             to enable to complete successfully
             to enable to reduce cost of production

     Disadvantages:-

             Defect detect after the manufacturing
             Higher manufacturing cost
             Needing more man power to maintain quality




     Quality assurance


     Improving and stabilizing production and associated process to avoid or at least
     minimize. Issues that led to the defects in the first place (before begin the production)

     Related to systems and not to a product as in quality control




     5   Lasitha nawarathna
Quality control



     Quality assurance focus on

             Quality manuals
             Systems certification
             Quality cost
             Documentation




     Now we can understand quality inspection or quality control or quality assurance not
     enough to maintain to quality of product we want collective application of this three
     concepts. This collective application has lot of advantages of inspection, quality control
     and quality assurance

     process chart of higher quality process




Before production                        Process of production                    Final products

Make quality manuals                     Maintain quality                         Final Inspection
                                         standards                                Identify defects
Systems certification
                                         In process Inspection




                                                                                Give feed
                                                                                back




                                     Quality inspection                                     Higher quality
                                                                                            products
                                     Quality control

    6   Lasitha nawarathna           Quality assurance
Quality control




(b) What is ISO 9000 standard ? explain why ISO 9000 certification essential to obtain for
    any production or service organization


   The ISO 9000 family of standards represents an international consensus on good quality
   management practices. It consists of standards and guidelines relating to quality
   management systems and related supporting standard



      ISO 9000 is a standard for a quality SYSTEMS not for product

   Why ISO 9000 certification essential to obtain for any production or service
   organization




  1. increase customer satisfaction and retention
      if any products has ISO 9000.that mean that products product by under the ISO
      standards. Customers can purchases it without any afraid.
  2. Create a more efficient, efficientive oparations
  3. Enhance marketing
  4. Improve employee motivation, awareness and morale
  5. Promote internal trade
  6. Increase profite
  7. Reduce wastage and increase productivity




  7   Lasitha nawarathna
Quality control


      03.
      (a) What do you understand by “quality cost” ?



      Total costs incur to ensure that product/ service provides conformation to the customer
      requirement.



      Quality cost =Inspection cost +testing cost +quality standard maintain cost+ process
      control cost+ defect rejection costs This all costs go to quality costs. but we can category this
      cost under this factors

                                             Quality cost categories




          Cost of control (cost of                                               cost of failure of
          conformance)                                                           control




Prevention cost                      Apprasist cost                Internal failure cost
                                                                                                      External failure cost
Includes the cost of any             Cost needed to                Cost incur prior to the
action taken to investing                                                                             Incur after transfer
                                     discover the quality          delivery to customer
quality defects                                                                                       of ownership to the
                                     level during
                                                                   1.Scrap                            customer
    1. Process control               production
                                                                   2. Rework and repair
    2. training quality                                                                               1.Replacement of
                                     1.Inspection R.M              3.cost of wastage
       personnel                                                                                      defect products
                                     2. In process                 time
    3. design review                                                                                  2.complains
                                     inspection
                                     3. Quality audits




             8    Lasitha nawarathna
Quality control



(b) A garment manufacturer has collected the following quality cost data. assign the to thefour
cost categories and present your finding as a percentage of total the cost




 type of quality cost                    cost in rupees     PC               AC           IF            EF
 scrap                                   75000                                            75000
 rework and repair                       80000                                            80000
 final inspection                        65000                               65000
 returned garments                       55000                                                          55000
 in-process inspection                   35000                               35000
 raw matrials inspection                 25000                               25000
 retesting                               30000                                            30000
 quality planing                         20000              20000
 quality systems audite                  20000                               20000
 quality improvement programme           55000              55000
 quality training                        15000              15000
 total                                   475000             90000            145000       185000        55000

 perecentage                                                18.9473684       30.5263158   38.9473684    11.578947




         9   Lasitha nawarathna
Quality control




4. Quality control department following defect at various sections of a garment factory




       1. In pattern making section : some pattern of size 12 ,14 and 18 mixed
         Resent= Didn’t pest or didn’t named part name pattern sizes like that information

            To avoid =Pest label to each parts include this details (part name ,pattern size )

       2.   In marker making : marker width is larger than average fabric roll width
            Resent = didn’t measure fabric average width before make maker

            To avoid = Must check the fabric width before make marker

       3. Spreading section: larger cut garment panels than actual size

            Resent = fabric spread in low tension

            To avoid= Maintain proper and correct tension in spreading

       4. Sewing section: skip stitches found with top stitching of shit pockets

            Resent=due to hook irregular fails to pick up the loop tread

            To avoid= use correct hook points without any damage ,
            Feed machine in proper thread loop formation




    10      Lasitha nawarathna

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Quality control

  • 1. Quality control (a) Briefly explain how the quality improvement helps to grow a production or service organization. What is quality? Quality is about meeting the needs and expectations of customers 1. Increase customer loyalty with that product or service organization Customers come again and repeat purchases again Customers recommend the product or service to others. Some customer after purchases if it has good quality he give good comments about it with his friend. It is big help to growing to business. 2. Can build up good and strong brand reputation for quality if Any company has good brand reputation they can easily can increase them sells. Example: - Sony Company has god brand reputation for quality than other electric equipment companies. Because they doing lot of quality improvements for them product. 3. Retailers want to stock the product Retailers are going to make stock mean production company can make big sales. It helps growing them business. Because they can do lot of investment form them money. 1 Lasitha nawarathna
  • 2. Quality control 4. Any product or service has done quality improvements they perceived to be better value for money. It may commend a best price and will become price increase. But customers purchase it because they think higher quality of that product. Examples:- We can buy Benz car more than 20 million But we can buy Toyota car 5 millions .but some customs going to buy Benz car. Because they Benz product has better value for money and that brand also has higher value for money 5. quality improvement help to make profitable business. Product or service has good quality improvements mean they have good market sale and market share and higher productivity/ efficiency and low production cost. That mean after the quality improvement processes any company can earn lot of profit. as 6. higher the job security ,higher the job satisfaction Now we know quality improvement help to make profitable business. The part of profit goes All the employees of that company. Increase them bonus and they have lot of benefits those things help increase to job satisfaction and job security. 2 Lasitha nawarathna
  • 3. Quality control (b) As a manufacture, how could you achieve a good quality product through its design and production phases What is quality of design? Measure of how will be designed in product/ service to achieve the required product Product or service organization mainly follows two important quality concepts Quality of designs Quality of conformance to design 1. Quality of designs Product or service organization measure how will be designed in product or service to achieve the required product How to achieve quality product though its design? I. Normally designer collect data’s though the markets researches. Researches gave data’s about obtain customers needs and what available now in the market. Now designer can decide the best method. If any product service can full fill customers requirements they can achieve higher sell and can billed higher brand reputation. II. Before decide final design designer have to consider man capacities of plant, technologies are available. III. Now designer decide actual specifications. Following factors :- 1. Aesthetic characteristics 2. Performance characteristics 3. Obligatory regulations characteristics 4. environment factors important 2. Quality of conformance to design Measures in what extent the product/service match with the design and customer actually receives should confirm to the design. Some time can depend on number of variables 3 Lasitha nawarathna
  • 4. Quality control 02. (a) Explain why collective application of quality inspection, quality control and quality assurance need to ensure a good quality product or service Quality inspection Inspection methods 1. Final inspection 2. Final and fixed intermediate Check 100% 3. Final and faxable intermittent inspection Check only 4. Patrol inspection samples 5. Centralized inspection Advantages and purpose of Quality inspection:- To detect poor quality products and separate them from acceptable quality products and scrap, rework and sell them as second quality In this Quality inspection process we can identified defect. Don’t give any feed back to production process. After the inspected get a decision made whether accept or reject Disadvantages:- 1. Late detection of defects, 2. Higher cost of defective work 3. poor access to production supervision 4. scrap quantity higher Due this disadvantages Quality inspection not enough to maintain higher quality of the product. 4 Lasitha nawarathna
  • 5. Quality control Quality control Main part of quality control:- Is quality inspection where the product was checked to ensure that it meet the customer requirements Quality control a process for maintain standards and not for creating standards Not like inspection gave the feed back to process to control / adjusts to minimize defects in future production .this is main advantage of quality control. Other advantages:- to increase the profit of business to enable to complete successfully to enable to reduce cost of production Disadvantages:- Defect detect after the manufacturing Higher manufacturing cost Needing more man power to maintain quality Quality assurance Improving and stabilizing production and associated process to avoid or at least minimize. Issues that led to the defects in the first place (before begin the production) Related to systems and not to a product as in quality control 5 Lasitha nawarathna
  • 6. Quality control Quality assurance focus on Quality manuals Systems certification Quality cost Documentation Now we can understand quality inspection or quality control or quality assurance not enough to maintain to quality of product we want collective application of this three concepts. This collective application has lot of advantages of inspection, quality control and quality assurance process chart of higher quality process Before production Process of production Final products Make quality manuals Maintain quality Final Inspection standards Identify defects Systems certification In process Inspection Give feed back Quality inspection Higher quality products Quality control 6 Lasitha nawarathna Quality assurance
  • 7. Quality control (b) What is ISO 9000 standard ? explain why ISO 9000 certification essential to obtain for any production or service organization The ISO 9000 family of standards represents an international consensus on good quality management practices. It consists of standards and guidelines relating to quality management systems and related supporting standard ISO 9000 is a standard for a quality SYSTEMS not for product Why ISO 9000 certification essential to obtain for any production or service organization 1. increase customer satisfaction and retention if any products has ISO 9000.that mean that products product by under the ISO standards. Customers can purchases it without any afraid. 2. Create a more efficient, efficientive oparations 3. Enhance marketing 4. Improve employee motivation, awareness and morale 5. Promote internal trade 6. Increase profite 7. Reduce wastage and increase productivity 7 Lasitha nawarathna
  • 8. Quality control 03. (a) What do you understand by “quality cost” ? Total costs incur to ensure that product/ service provides conformation to the customer requirement. Quality cost =Inspection cost +testing cost +quality standard maintain cost+ process control cost+ defect rejection costs This all costs go to quality costs. but we can category this cost under this factors Quality cost categories Cost of control (cost of cost of failure of conformance) control Prevention cost Apprasist cost Internal failure cost External failure cost Includes the cost of any Cost needed to Cost incur prior to the action taken to investing Incur after transfer discover the quality delivery to customer quality defects of ownership to the level during 1.Scrap customer 1. Process control production 2. Rework and repair 2. training quality 1.Replacement of 1.Inspection R.M 3.cost of wastage personnel defect products 2. In process time 3. design review 2.complains inspection 3. Quality audits 8 Lasitha nawarathna
  • 9. Quality control (b) A garment manufacturer has collected the following quality cost data. assign the to thefour cost categories and present your finding as a percentage of total the cost type of quality cost cost in rupees PC AC IF EF scrap 75000 75000 rework and repair 80000 80000 final inspection 65000 65000 returned garments 55000 55000 in-process inspection 35000 35000 raw matrials inspection 25000 25000 retesting 30000 30000 quality planing 20000 20000 quality systems audite 20000 20000 quality improvement programme 55000 55000 quality training 15000 15000 total 475000 90000 145000 185000 55000 perecentage 18.9473684 30.5263158 38.9473684 11.578947 9 Lasitha nawarathna
  • 10. Quality control 4. Quality control department following defect at various sections of a garment factory 1. In pattern making section : some pattern of size 12 ,14 and 18 mixed Resent= Didn’t pest or didn’t named part name pattern sizes like that information To avoid =Pest label to each parts include this details (part name ,pattern size ) 2. In marker making : marker width is larger than average fabric roll width Resent = didn’t measure fabric average width before make maker To avoid = Must check the fabric width before make marker 3. Spreading section: larger cut garment panels than actual size Resent = fabric spread in low tension To avoid= Maintain proper and correct tension in spreading 4. Sewing section: skip stitches found with top stitching of shit pockets Resent=due to hook irregular fails to pick up the loop tread To avoid= use correct hook points without any damage , Feed machine in proper thread loop formation 10 Lasitha nawarathna