Leading processes to lead companies: Lean Six Sigma: Kaizen Leader & Green Belt Handbook
Format: PDF / Kindle (mobi) / ePub
This Minibook is a brief guide for Green Belt during a Lean Six Sigma project management or for Kaizen Leader during a process improvement activity. Through both its theoretical concepts and practical examples it is a pocket book for a quick consultancy. Authors idea comes from companies needs in order to analyze information useful to know in depth different kind of processes. The set of Six Sigma tools are explained through Minitab 16, the last release of the most widely used statistical software.
– Confidence Interval for Standard Deviation – Confidence Interval for median – Confidence Interval for mean • Seen in this chart are confidence intervals (with confidence level of 95%) for the estimation on population, which the sample of the analyzed data comes from: Graphical Summary 75 LEAN SIX X SIGMA MIINIBOOK DEFINE MEASURE ANALYZE IMPROVE CONTROL • With the Boxplot you can see if any Outliers exist (if yes, yes an invesinves tigation must be done to find out the reasons), or
if there are any points not belonging to the same distribution of the remaining data, they must be probed, too When to use it: • The Boxplot is a tool useful for studying the distribution of coll lected d data d and d to obtain b information f on position, dispersion, d and d symmetry Objective: Boxplot 76 LEAN SIX X SIGMA MIINIBOOK DEFINE MINITAB: MEASURE ANALYZE IMPROVE Graph > Boxplot… Boxplot CONTROL 77 LEAN SIX X SIGMA MIINIBOOK DEFINE MEASURE A ANALYZE Boxplot
– – – – – ANALYZE • Cause-Effect Diagram • Statistical Hypothesis Testing Table of contents page 137 page 138 page 145 page 147 page 151 page 155 page 160 page 164 page 168 page 174 page 178 page 183 page 186 XIII LEAN SIX X SIGMA MIINIBOOK CONTROL • Control Chart • Control C t l Ch Chartt ffor continuous ti variables: i bl IIndividual di id l • Control Chart for continuous variables : Xbar-R • Control Chart for attributes: P Chart • Poka Yoke • Visual Management • OPL One point Lesson
diagram DESCRIPTION CONTROL • Cycle Time/Set Up Time/Uptime • No. of Shifts • Batch Size • Wip • % Defects (PPM,DPMO) Example of information for a process: • No. of Operators (VSM icon Identify Process Name Identify kind of process ) •Customer/Supplier Name •Customer/Supplier location (Europe, USA etc.) •Number of products required •Mix of products •Batch B t h size/delivery i /d li llead d ti time ((supplier) li ) Gather information such as: PRACTICAL NOTES These icons are the common
¹ 2 Sample size calculation for the estimation of the population proportion (formula for discrete data): Sampling 56 LEAN SIX X SIGMA MIINIBOOK DEFINE MEASURE ANALYZE n= correct N IMPROVE n 1 +n CONTROL CORRECTIVE FORMULA • If the sample size is more than 5% of the size of the population, it is possible to adjust the sample size obtained with (i) and (ii) using the formula below: n < 0.05 0 05 N • Formulas (i) and (ii) are valid if the sample size is less than 5% in comparison