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Found 24 results

  1. In FMEA , for RPN (Risk Priority number)'s threshold value, is there any industry thumb rule or best practice that can be used?
  2. When managers need a focusing method, they should collect data and use it effectively. Two focusing methods which are commonly used are The 80-20 principle and the Theory of Constraints. 1. The 80-20 principle -states that, for many events, roughly 80% of the effects come from 20% of the causes. If we are able to find those vital few that contribute to most of the delays or delays or time spent, we can try to find methods to address them. This requires data collection and preparation of a Pareto chart. A hospital may like to know which of the complaints are most frequent at the OPD. A manufacturing company would like to find what contributes most of their inventory cost. A boutique may like to know which type of designs is most demanded. An ice-cream parlour may like to know which types are most sold and should be promoted, displayed or stacked better. 2. Theory of Constraints – states that, any manageable system is limited in achieving more of its goals by a very small number of constraints, and that there is always at least one constraint. In simple words, a step is called a constraint if its inflow rate is more than its outflow rate. For example - If there is a queue in a billing counter but all other steps are smooth flowing, (as found in a mall on a weekend), the billing step is a constraint. If a machine commonly has unfinished inventory before the operation and no inventory after the operation, the machine's step is a constraint. The important learning from TOC are - If we improve processes or steps that are not constraints in the system, then we are probably wasting our resources and the business impact of change is not going to be felt. Once you remove a constraint from the system, another constraint appears. The constraints keep shifting but never disappear altogether. QUESTION - Do you find the two methods similar? Do you have a point to make on this subject?
  3. 5S Lean Training Video Test

    This is a test to see how to share 5S Lean YouTube video on this site. Didn't see any obvious way. Also will be sharing the associate free online assessment afterwords. http://www.youtube.com/watch?v=t8IfQp4A4ZI Also SEE Free Online 5S Lean Manufacturing Assessment
  4. Dear VK Sir, I would like to know the efficiency of printing press and process capability,employes attendance register I have the employee details ,Capacity of machines,actual pages printed ,expected pages per day,date ,daily data so in control charts what should we take and how in general how we should go about it . Thanks
  5. Dear All , Pls guide if Multivari chart can be used for discrete data . If yes Pls guide how ????
  6. 5S

    Hi all I am working in KPO industry. I am interested to start 5S concepts in my team. I know the concepts of 5S. I dont know how to start. Can anyone guide me? Thanks in advance Manikandan Shankar
  7. I am creating one training material on ANOVA ANOVA : to analyze two samples or more than two samples compare sample means , Null hypothesis : Ho : m1 =m2=m3=....mn Alternate hyposthesis : Ha : any one of the sample means is significantly different The above is one way ANOVA. Then what is two way ANOVA ? when samples have two distict categories . The ANOVA study is two way ANOVA. I am not very comfortable on this understanding. Looking for some coaching and some training material on ANOVA study. Not to confuse with ANOVA gage R&R study. parashuraman ramaswamy
  8. Hi Universe of 2110 documents have to be sampled. Using the sample calculator, with 95% confidence level and 4% Margin Error the sample size arrived is 467. However, when I selected randomly 10% sample (211 documents), the sample mean and sample median is not too much deviating from the population mean and population median. The SE Mean is also very low (0.00787). Sample Mean - 2:08 (h:mm) - 2:07 is population mean. Sample Median - 1"04 (h:mm) - 1:04 is population median CI for Mean = 1:45 (h:mm) and 2:30 (h:mm). CI for Median = 0:47 (h:mm) and 1:16 (h:mm) My question is, considering this example, if 10% sample can have good representation of the population then how significant is the 467 sample size which came out of the sample size calculator of 95% CL and 4% CI? I am not sure if this question is limited to the example I have, but wanted to understand the concept. Please help. Thanks Madhan
  9. T-Value Understanding

    Hi, I want to understand the actual meaning of t-value.As I understand that t-test is for mean checking of no. of datasets. What happens if t-value more or less. Could you pl put some light on this. Rds. Yogesh
  10. Scientific Sampling

    Can someone help me to understand the difference between the Margin Error and Confidence Interval? I understand that when the confidence interval increases sample size will be smaller and when the margin error increases sample size required will be higher. But I am curious to know what is the difference and interpretation between these two when we are looking at statistically signifcant samples. Thanks Madhan
  11. What is the difference between Sampling plan and Inspection, my knowledge Sampling is used to accept or reject a product lot however the Inspection is used to judge the quality of the product. but still i need more clarification.
  12. Friends, Would appreciate if someone can offer a BPO example (let's a say a call evaluation process) where Attribute Gage Study (Analytic Method) can be applied. The example offered in Minitab 15 is'nt striking enough......help will be appreciated....Gud times... Kiran Varri
  13. While using this option in Minitab 15, the 4 columns : StdOrder, RunOrder, Parts & Operators actually do not give the measured values. i.e the actual measurements. Then how is this option helpful in day to day life of a SixSigma Professional....guidance appreciated.... Gud times... Kiran Varri (www.kiranvarri.blogspot.com)
  14. Sipoc

    Hi Please tell me what is the use of Sipoc ?
  15. P_Control_Chart.xls I have created a "P Control Chart" in Excel Spreadsheet for different Sample Size. But unable to get the accurate graph as Sample Size varies, the control limits change. In case of "Zero" defects from "x" sample size the process should be "Under Control" whereas the graph depicts "Out of Control" because the LCL is "0.08" but Process "p" is "0.00" (Please see row 8 in attached spread sheet). Likewise, there are couple of other samples where it shows Process is out of control as I am unable to make LCL zero when sample size is varying each time. Please suggest me the way out or facilitate me an excel spread sheet which provides accurate chart when Sample Size Varies each time.
  16. Hypothesis Testing

    Hi, My name is Ravi,  I have started a project for my GB. Project is on Customer satisfaction. 1. I know the VOC 2. I know what are the factors effecting CSAT with the CSAT survey data which we get. 3. I have completed fish bone , XY chart . 4 . I need to start hypothesis tesing, how do i proceed with hypothesis testing. Need help.
  17. Implementation Of Fmea

    Can any one help me abt FMEA like how to calculate etc.etc. mine is an electronics company supplying on OEM basis.
  18. Regression Analysis

    Hi every one , what is Regression Analysis and corelation ? how it's calculated in the case of simple regression and multiple regression ? Ashish
  19. Pfmea

    Dear all Please suggest me when to implement PFMEA, and how to start? Regards, Sanjeev.
  20. A Query In Statistics

    Hi! As a Six Sigma resource, i work for a BPO. I have this question on Non parametric testing. Please consider this case: When we go in for a parametric testing for equality of means for more than 2 populations, we conduct an ANOVA test to find out whether there is a significant difference amongst them or not. Now, if the null hypothesis gets rejected, we go ahead and conduct Tukeys or Scheffé's method to find out which population is significantly different from the others. While if the data is non normal or discrete, we go ahead with the Non parametric ANOVA (Kruskall-Wallis test or others) what happens if the Null gets rejected here, how do we find out the population with a significantly different measure of central tendency. Could anybody throw light on this and help me with this? Thanks in Advance! Regards, Prateek
  21. Xbar-R And Xbar-S Charts

    Hi, I want to understand the difference in usage or significance of both these charts apart from the fact that Range is involved in one of these and Sample SD is involved in the other How do we really decide: 1. When these charts should really be applicable/useful in practical scenario 2. Which of these should be preferred. Please share your views on the same.
  22. Imr Normal Data

    I have a basic question - i understand while using I-MR chart the data has to be normal. my question is why must the data be normal.
  23. Even though Lean and Six Sigma are more than a set of tools. Here are some commonly used tools / methodologies in Lean: Waste Identification Standard Operating Procedures (SOP) Continuous Improvement (Kaizen) Value Stream Mapping (VSM) Metrics (Cycle Time, TAKT Time, Process Cycle Efficiency) Planning (A3, Hoshin-Kanri) Mistake Proofing (Poka-Yoke) Total Productive Maintenance (TPM) Single Minute Exchange of Dies (SMED) Load Balancing (Heijunka) Plan - Do - Check - Act Cycle (PDCA) Visual Controls Pull Systems (Kanban, Supermarket, FIFO) Flow Concepts Line Balancing Just in Time Concepts Autonomation Workforce Engagement Workplace Organization (5S)
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