Archive for the ‘CHARTrunner’ Category

Software short: Software pricing based on usage

February 27, 2009

Steve Daum

For 20+ years we have been selling our software based on a per-workstation license. The idea is that for each computer where the software is installed, the user must purchase one license. This has worked well and we will continue to offer this option into the future.

One of the trends we are watching is software licensing based on how much it is used. There are different usage-based pricing models but most of them tie the price to how many people use the software rather than the number of computers where it is installed. In the past, the technology for managing this type of license added complexity to the installation and deployment experience. With networks, the internet, and new license tools, the usage-based license model is becoming more appealing.

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Software short: A more informative x-axis label for your control chart

January 30, 2009

Steve Daum

I spoke with a customer the other day who wanted multiple labels along the x-axis of his control chart. His data set and original chart looked like this:

Did you notice how the x-axis labels contain only the date column? He also wanted the batch number as part of the x-axis label. In the chart definition form, you can select only a single identifier as the label as shown below:

The solution lies on the data definition tab.

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Data in everyday life: Think it’s hot where you live?

January 26, 2009

Alison Nelson

This winter has been one of the coldest on record for many people in the US and Canada.

For everyone looking for a place to warm-up, this CHARTrunner chart shows the average number of above-90-degree days in 10 of the warmest cities in the US.


Source: USA Today Weather

You can enjoy these entertaining charts every month when you subscribe to our free electronic monthly newsletter, Quality eLine. But Quality eLine offers more than just winter warm-up destinations. Each issue features Six Sigma information, quality training tips, statistical process control help, gage R&R information, and more. Subscribe today!

Software short: Charting time data on a control chart

January 16, 2009

Matt Savage

Recently I was given an Excel file that contained some data for the time it took to complete a task. The data had a column that listed the “time” and the data was in time-of-day format. I wanted to make a control chart showing how long, in minutes & seconds, a task took. Unfortunately, Excel categorized this as a Date/Time field, which can not be easily charted. Since the column listed the time the task took in hours:minutes:seconds, I needed a way to convert this to a number that I could chart on a control chart.

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