SIX SIGMA FACTSHEET Six Sigma aims to （六西格玛字幕新闻六西格玛旨在）.pdfVIP

SIX SIGMA FACTSHEET Six Sigma aims to maximise customer satisfaction and minimise defects. WHAT IS SIX SIGMA? WHAT IS SIX SIGMA? 1 In statistical terms, the purpose of Six Sigma is to reduce HOW DOES SIX SIGMA WORK? 1 process variation so that virtually all the products or services provided meet or exceed customer expectations. This is defined PROCESS IMPROVEMENT as being only 3.4 defects per million occurrences. IN DETAIL 3 Six Sigma was developed by Motorola in the 1980s but has its roots in Statistical Process Control (SPC), which first appeared in 1920s. HOW DOES SIX SIGMA WORK? There are three basic elements to Six Sigma: ● Process improvement ● Process design/re-design ● Process management Each of the above three elements is examined in more detail below. Process improvement The purpose of process improvement is to eliminate the root causes of performance deficiencies in processes that already exist in the organisation. These performance deficiencies may be causing real problems for the organisation, or may be preventing it from working as efficiently and effectively as it could. To eliminate these deficiencies a five-step approach is used. DEFINE – a serious problem is identified and a project team is formed and given the responsibility and resources for solving the problem. MEASURE – data that describes accurately how the process is working currently is gathered and analysed in order to produce some preliminary ideas about what might be causing the problem. ANALYSE – based upon these preliminary ideas, theories are generated as to what might be causing the problem and, by testing these theories, root causes are identified. IMPROVE – root causes are removed by means of designing and implementing changes to the offendi