QUALITY ASSURANCE IN THE SALT INDUSTRY BY BRIAN T DANGERFIELD
OBJECTIVE l Definition of QA l Overview of QA methodology & procedures required to deliver quality l Focus on QA w. r. t salt iodization
QA is a wide-ranging concept which covers all matters which individually or collectively influence the quality of a product. It applies to equipment, product design, supplies and logistics, management and human resource development, and all elements designed to ensure that products are of the quality required for their intended use.
TOPICS TO BE COVERED Dispersion l Iodizing plant capability l Production lot size & sampling plans l Monitoring product quality l – Interpretation of QC results – Criteria for acceptance Communication & information flow l Documentation l Customer Service l
DISPERSION
DISPERSION DUE TO VARYING SALT FLOW
TYPICAL IODIZING UNIT
IODIZING PLANT CAPABILITY l Validation of Process – Minimum of 5 sample means from repeated tests – Variance < 2% – Relative Standard Deviation < 3% l Range of iodine < mandatory limits
Typical Process Control Chart
PRODUCTION LOT SIZE & SAMPLING PLAN l Suitable for non-homogeneous bulk material lot size daily output of packed product l Production – truck size, no. of bags etc. l Minimum of 3 to 5 samples per production lot for analysis of iodine l Erroneous results from 1 sample/batch
SALT BAGGING LINE
MONITORING PRODUCT QUALITY l Frequency of sampling l Handling of composite samples l Recording of samples l Analysis of samples l Acceptance Criteria - statistical – l Acceptance U - Ks or L + Ks Criteria - range
COMMUNICATION & INFORMATION FLOW l Short channels - small producers l Routing of QC report – Record corrective action l Use of packaging – Production lot no. – Nominal iodine content
DOCUMENTATION l Available for review l Record of QC data by sample no. /dates/production lot l Holding of samples l QC Reports - larger producers – Indicate acceptance/rejection
CUSTOMER SERVICE l Customer confidence builds business l Complaints handling procedure – Promotes supplier responsibility l Open house relationship
SUMMARY OF QA PRINCIPLES l Set quality standards l Validate Plant Capability & Maintain l Delegate responsibility for performance l Measure output against standards l Apply acceptance criteria l Define corrective action for non-compliance l Focus on quality
INCREASING AVAILABILITY OF IODIZED SALT l Information required re current status by country – Problem of no or low monitoring – Lack of government resources l Surveys required to determine current status – Contract out if necessary – Example of RSA l Formulate action plan to bring non-iodizing companies
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