What is Six Sigma ? – A Tool to Conquer Variability
Definition of Six Sigma Six Sigma is not a mere methodology or a quality tool. It is a philosophy i.e. a systematic way of thinking to solve quality problems. Six sigma involves use of statistics to convert raw data into facts about how the processes of the organization are being run. The thrust is on […]
The Alignment of Technology and Corporate Planning
Introduction In the digital age, information technology plays an important role in the success of an organization. Technology provides edge in this globalized world. Companies are facing competition not only from local companies but from international companies as well. In such a scenario, it is important that company invest in technology which is aligned with […]
Is Israel Really an Economic Miracle?
Israel is one of the youngest countries in the world. It has been in existence for only 72 years. While many of its peers such as India and Pakistan are still developing nations, Israel has quickly climbed the ladder. Israel is not considered a developed nation. This is because the per capita income in Israel […]
Customs Clearance – Meaning, Scope and Documentation
Customs Departments are the government designated authority to implement the policies related to import and export, collect customs duties and facilitate movement of people, goods, and cargo into and out of the country. Area of Operations and Authority Customs departments have offices at all seaports, airports and border gateways that are essentially the exit and […]
Communications Management during Project Planning
Communications planning involves identifying the information and communication needs of the stakeholders. This includes determining what needs to be communicated, to whom, when, with what method and how frequently. This is a very proactive approach. The PMBOK guide often suggests work to be done in a more structured way than many project managers previously thought […]
Shift in the Process: A shift in the process is defined as a pattern in which seven consecutive data points appear on only one side of the mean. Statistical studies have shown that if the number of points on one side of the mean is less than 7 then it is not a non-random pattern and could have occurred due to random causes.
A shift in the process is very important for the management to detect. This is because it signifies that the average of the process has moved to a different level. Therefore, the control chart with the mean and control specifications based on old measures is redundant and will give wrong information. It is for this reason that it is important for the organization to detect this pattern as early as possible and take corresponding measures. The most common causes of the appearance of non- random shift patterns is as follows:
Process Improvement: Shifts in process means usually happen as a result of a deliberate attempt through a process improvement initiative. The best practises to do any task are continuously evolving. Introduction of new technologies enables newer and better ways of performing the work. This pattern can be detected on the control charts and the process improvement can be institutionalised.
Introduction of New Inputs: Another common reason for shift in the process mean is the introduction of new inputs. These new inputs could be markedly better or worse than the inputs used earlier and as a result change the performance of the entire process
Change in Quality Control Measures: The shift could also be the result of a change in quality control measures. The thrust may have changed from cure to prevention and as a result the quality checks may have dramatically improved the process, shifting its mean.
As the name suggests, this may be quite straightforward. However the logic behind this pattern is interesting. The normal curve states that 95% of all data points will lie between 2 standard deviations. However, if 2 out of 3 consecutive points are lying on or above the standard deviation, we can be rest assured that the 95% criteria is not being met, at least in that point in time.
This is therefore an early sign to the management that the process may be about to go out of control. A thoughtful management will make corrective action plans that will look into the process, understand the issue and correct it as soon as possible.
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Step 3B: Choosing the Correct Control Chart (Continuous Data)
February 12, 2025
