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  1. Benchmark Six Sigma Expert View by Venugopal R One of the main intent for executing a project using the six sigma methodology is to guide a team through a disciplined approach to solve a problem in a highly objective manner. Various terminologies have been coined to reinforce the disciplined approach. “Process Door” and “Data Door” are terms used to broadly classify the approach to be used during the Analyze phase. Ironically, though one of the approaches is termed as “Data Door”, it does not mean that the “Process Door” will not use Data! Effectiveness and Efficiency Fir
    2 points
  2. In parametric statistics, when we have to compare means of two samples there are several test where 2 samples are dependent and independent 2 Sample T Test are used to compare the means of 2 sample which are not dependent on each other and have equal variance (determined by F test) which is normally distributed. Example: If we want to compare performance of two team (sales performance) Comparing the runs scored by two different team Outcome of a drug testing on 2 independent groups Wherein Paired Sample T test is performed to compare means of 2 samp
    1 point
  3. Benchmark Six Sigma Expert View by Venugopal R When we have to compare the averages for two samples, it could be for different reasons: 1. To estimate whether two existing populations are different with respect to their average values of the characteristics of interest. Examples: To compare the average life span of bulbs produced by two different companies Average marks scored by male students vs that of female students 2. To estimate whether the effect of some change on a given population is significant or not. Examples: Performance of
    1 point
  4. Two Sample T Tests are statistical tests that are used to compare the mean values of two independent samples/groups to determine if there is a significant difference between the means of 2 samples in reference. Two samples are considered to be independent if the selection of individuals/objects of one sample does not influence the selection of individuals/objects in the other sample in any way. The data from both samples should be normally distributed to apply the Two Sample T Test. On the other hand, a Paired T Test is a statistical test that is used to compare the mean values of
    1 point
  5. In any hypothesis testing we have to decide on the level of significance which is denoted by alpha. This is important as failure to choose correctly null hypothesis can cause Type 1 error. IF α is small - There is lass chance of incorrectly rejecting a Null hypothesis (H0) Since the power is low this decreases the chance of detecting an effect if one exists IF α is Large - There is a higher chance of incorrectly rejecting the Null hypothesis (H0) Since the power is high there is high chance of detecting the effect To Select α for a Hypothesis test
    1 point
  6. The Process Door and Data Door In DMAIC process, analysis phase is very important phase to analysis the data and there are many tools & techniques which are used for analysing data however some challenges to use right tool & techniques in right situation. Process door and data door are useful to divide the analysis phase into two section which is useful to get the actual analysis. Process Door Process door apply to a section of tools & technique that help to understand and get a clue from process directly. below tools generally use in process door 1.
    1 point
  7. In order to answer the question 'Why is the problem occurring?", below steps are done in Analyze phase 1. List all potential causes 2. Analyze potential causes 3. Identify critical causes There are 2 approaches that can be deployed for analyzing potential causes. I have summarized both in the table below P.S. the usage of tools is not exclusive i.e. tools can be used either for process or data door depending on the situation. The table only highlights the preferred or the most commonly used tools.
    1 point
  8. In Analyze phase of DMAIC, Xs’ (or causes) are identified basis different methodology of which Brainstorming is widely used. Post identification of X’s prioritization of X’s are done, where impact of X’s are studied over Y (effect). Prioritization could be performed by 2 ways “Data door or Process Door” Data door- For all the X’s where data is quantitative in nature (which can be measured). Data door method is taken. Commonly used tool for Data door approach are: Graphical Analysis: Trend Chart, Run Chats, Control Chats, Histogram etc Hypothesis Testing: Annova, Regr
    1 point
  9. Let us consider two numbers a and b where a is greater than b. If the ratio of the sum of these numbers (i.e. a+b) to the larger number (i.e. a) is same as the ratio of the numbers (i.e a is to be), then these two numbers are said to be in a Golden Ratio. Golden Ratio => (a+b) / a = a / b This is denoted by Greek letter phi ( or ). This ratio comes to an irrational number = 1.618 Applicability of Golden Ratio is found in 1. Nature - sunflower, position of leaves 2. Architecture 3. Art 4. Music 5. Technical Analysis of Stocks
    1 point
  10. The curse of dimensionality refers to various phenomena that arise when analyzing and organizing data in High dimensional spaces that donot occur in lower dimensions like 3D physical space of every day life. Dimensionally cursed phenomena occurs in sampling, numerical analysis, data mining , machine learning and databases. The common theme of these problem is when dimensionality increases, volume of space increases and available data are sparse.This becomes problem for any method that requires statistical significance. In order to obtain a statistically sound and reliable results the
    1 point
  11. What is a Block Diagram? A block diagram is a specific, high-level flowchart utilized in engineering, hardware design, electronic design, software design, and process flow diagrams. It is used to design innovative systems or to describe and enhance existing ones. The block diagram represents, at a sketch level, how a process flows from function to function or from unit to unit within an establishment. The diagram uses blocks to reflect the essential activities and links them together by connecting lines representing elements or communication flows. Essential Components of a Block Dia
    1 point
  12. Aritra Das Gupta and Joyal are the winners for this question for highlighting the interactions between the three constraints using various scenarios. Also review the answer provided by Mr Venugopal R, Benchmark Six Sigma's in-house expert.
    1 point
  13. Benchmark Six Sigma Expert View by Venugopal R A Project Manager is often faced with the challenge of balancing a project amongst multiple constraints, the most popular ones being Scope, Timelines, Cost. Many a time, the competitiveness of a project depends upon one or more of these factors. One of the key responsibilities in Project Management is to coordinate with Project team and the connected stakeholders to successfully manage the variabilities of these elements and their interrelated effects. The 3 elements of this ‘trinity’ are represented using a triangle as below:
    1 point
  14. Holy Trinity is also known as Project Management Triangle, Iron Triangle or Triple Constraint. It is an equilateral triangle with Cost, Time and Scope. It outlines the 3 major constraints that a project manager faces. It also dictate the scope of the product you deliver. Together, they outline a space in their center, which is project Quality. Out of all the 3 sides of the triangle in project -the client is allowed to control any two sides of the triangle, but the producer MUST be in control of the third, whichever that is. The amount of control you retain ultimately reflect in the quality of
    1 point
  15. The Holy Trinity for any successful project hey are depicted in the above picture. The Success of a project is dependent on 3 important aspect which is schedule ,scope and budget . hey in order to make a project successful it is imperative that one site of the triangle should be in one’s control the other 2 can be in control of the customer. If scope ,budget and schedule are in control off the customer there can be a challenge in the quality of the project deliverable . there are many organisation who face this challenge sense they have a very demanding customer who tries to have us very
    1 point
  16. CTQ (Critical to Quality) Tree is used to drill down to a more concrete project goal. It starts with wider project goal and works downwards to identify “Critical” factors that is required in achieving the goal. In simple words drill down generic goal, identify specific and measurable necessities to improve performance. It translates customer needs to Meaningful, Measurable, and Actionable metrics. Approach: Step 1: Identify Critical Needs "What is critical for this product or service?" Brainstorm needs with key stakeholders Step 2: Identify Quality Requi
    1 point
  17. I observed that the scope of six sigma has increased it is now applicable in many industrial sectors. When Bill Smith created this methodology his main focus was defect reduction and improvement which brings excellence and process improvement, later on Quality formed the core of other methodology/framework too. I have seen that the approach of employees toward quality management has not yet changed, they still consider this as the job of quality unit, as for them quality means compliance, reporting, QMS manual and most importantly Audits. I found that organizations are spen
    1 point
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