[vtk-developers] VTK Developer Trends

[Andras Lasso]

You can get some statistics from openhub (such as contributors per month, commits per month, ...):

https://www.openhub.net/p/vtk

https://www.openhub.net/p/itk

https://www.openhub.net/p/slicer (due to some reason last analysis was done 8 months ago; also, most commits are received through github and committed to SVN, so number of integrators is reported as number of contributors)

Andras

-----Original Message-----
From: vtk-developers [mailto:vtk-developers-bounces at vtk.org] On Behalf Of Bill Lorensen
Sent: Tuesday, August 1, 2017 7:05 PM
To: VTK Developers <vtk-developers at vtk.org>
Subject: [vtk-developers] VTK Developer Trends

Folks,

There has been a lot of talk lately on the VTK and ITK lists about attracting more developers. Many subjective suggestions are being discussed.

From my GE 6Sigma training, I recall that a more objective approach can be useful.

The first step in the process is to measure, then analyze, followed by improve and control.

I generated a spreadsheet that tracks the number of developers, developers gained and developers lost for each year from 1995 through 2016. I've attached a PDF of the spreadsheet.

For example, in 1995 there were 3 developers (guess who). In 2016 there were 99 developers. By developer I mean at least one checkin to the repository.

In 2010 we gained 23 developers but lost 48. Why?
In 2016 we gained 28 but lost 50.

I'll post the individual files on the VTK wiki. I'll also do the same measurements for ITK and Slicer.

Bill


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