Hi Anil, Thanks f or sharing. Yes, 6 sigma level is +/- 6 sigma instead of +/-3 sigma because of 1.5 sigma shift. But my key question is what is the justifiable rationale of such shift and make it +/- 6 sigma instead of +/- 3 sigma prior to Motorola concept of 1.5 sigma shift. Thanks
Hi All, I just newly joined this discussion topic. Can anybody share with me why Motorola wants to use 1.5 sigma shift to replace original statistical concept of 6 sigma is based on plus and minus 3 sigma ? I read few sigma books but not really mentioning on why and is it valid with such a shift. What is the rationale with such a shift and it is stastical proven based on the Gausian Distribution Leon