Introduction to Six Sigma

Six Sigma (6σ) is the way of doing things, a study of methods that consists of structured, disciplined, data driven analysis in order to eliminate defects. Six Sigma consists of  set of tools and techniques to improve an existing process, product or service or to create a new robust one.

This was first introduced by engineer Bill Smith while working at Motorola in 1986. He used a statistical approach to problem solving using basic statistics methods and tools.

What does the sigma (σ) in six sigma stand for. Sigma or otherwise known as standard deviation is a statistical term. It is a measure of variation from the mean or average value in a classic bell distribution as shown below.

Sigma-chart

We now define mean or mu (μ) as shown above as the measure of central tendency in the given distribution. In order to find we do a sum of all the data points and then divide them by the number of data points, this gives us the mean of that data set.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s