Procedura integrata di progettazione PDF

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Ing. Daria Battini

IMPIANTI INDUSTRIALI

INTEGRATED PROCEDURE 1. PRODUCT FAMILY ANALYSIS

TECHNOLOGICAL VARIABLES VARIABLES LINKED TO MARKET DEMAND

ENVIRONMENTAL VARIABLES

2. ASSEMBLY CYCLE DEFINITION

1) Production volume 2) Production mix: - single model assembly system - mixed model assembly system - multi model assembly system 3) Flexibility required in production mix and production volume

VARIABLES LINKED TO WORK FORCE 1) Labor turnover and replacements strategies 2) Absenteeism 3) Work allocation - Maximum length of sustainable work load per operator - Job enlargement/assembly content - Physical human diversity - Learning curve - Task repetitiveness 4) Trade-unions involvement 5) Psychosocial Factors - Influence on and control over work - Stimulus from the work itself - Supervisor climate - Relations with fellow workers - Psychological work load

3. ASSEMBLY TIMES ESTIMATION

4. PRODUCTION FLOW STRATEGY SELECTION:

VARIABLES LINKED TO PRODUCT 1) Product life time (flexibility to products variations and changes) 2) Products components: - number/commonality/modularity - physical dimension and weight

1) System layout 2) Cycle time (paced/un-paced) 3) Workstations type (i.e. open/closed, parallel/serial, two-sided,..) 4) Automation level 5) Rough-cut capacity planning

VARIABLES LINKED TO ASSEMBLY PROCESS 1) Assembly tasks - time length - time variability 2) Assembly cycle and precedence diagram configuration 3) Process setup times

5. ASSEMBLY TIMES MEASUREMENT

VARIABLES LINKED TO ERGONOMICS AND SAFETY:

6. ERGONOMICS EVALUATION

Workplace design

VARIABLES LINKED TO SPACE 7. ERGONOMICS IMPROVEMENTS

1) Space available for: - assembly system - materials inventories - human resources - material handling/lifting devices

NO

1) Tasks repetitiveness 2) Movements length/muscolar load 3) Body posture 4) Maximum and normal work area 5) Weight handled 6) Anthropometrics data 7) Human diversity 8) Automation level required to prevent injuries/diseases

ERGO QUALITY SATISFACTION

OK 8. OPTIMAL WORKPLACE DESIGN

14. STANDARD TIMES DEFINITION

9. SYSTEM BALANCING

10. SYSTEM SEQUENCING

13. FINAL OUTPUT REALIZED REPORTING

12. PERFORMANCE MONITORING 11. INCENTIVES AND INCREMENTAL IMPROVEMENTS

PRODUCTIVITY AND ERGO QUALITY INCREMENT

FONTE: Battini D., Faccio M., Persona A., Sgarbossa F., New methodological framework to improve productivity and ergonomics in assembly system design, Int. Journal of Industrial Ergonomics, Vol. 41, 2011, PP. 30-42...