Lean Six Sigma
Lean Six Sigma is a method based on collaboration within a team in order to improve performance by systematically removing wastefulness and reducing deviations. It combines Lean Manufacturing / Lean Enterprise and Six Sigma in order to remove the eight types of wastefulness:
- Waiting and idle time
- Unnecessary movements
- Incorrect procedures and processes
- Rejections and rework
- Unexploited talent
The DMAIC process as a systematic procedure in Lean Six Sigma projects
DEFINE phase: A common understanding of the project, its demarcation and central requirements
Element examples: Project order / project organisation / demarcation / multi-generation plan / change management / project risk analysis / process depiction (SIPOC) / customer requirements (VoC: Voice of the Customer, CTQ: Critical to Quality) / House of Quality (QFD1) / prioritisation tools etc.
MEASURE phase: A common understanding of the process performance
Element examples: Definition of output measured values/ operational definition / data types / position and scatter/ data collection bases / spot checks / measuring system analysis (MSA) / types of variation / variation presented graphically / statistical process controls (SPC) / process capability / quality indicators etc.
ANALYZE phase: A common understanding of central causes
Element examples: Develop potential causes (Ishikawa, FMEA) / process analysis / value stream diagrams / Makigami / value analyses / bottleneck analyses / process efficiency / detection of patterns in data / bases of statistical tests and analysis methods / correlation and regression bases / statistical hypothesis tests / ANOVA procedures/ insight into design of experiments (DoE) / derivation of core causes etc.
IMPROVE phase: A common understanding of relevant solutions
Element examples: Prepare alternative solutions / derive basic concepts / assess basic concepts / lean criteria for process optimisations / solution selection and implementation / target processes / pilot testing / process simulation basics / process management development etc.
CONTROL phase: Common understanding of mechanisms for sustainable implementation
Element examples: Target processes / procedure instructions (SOPs) / / statistical process control (SPC) / finalisation of process management diagrams / reaction plans etc.
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