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Archive for 2017


When a system is modified, does its TRL change?

Posted on: August 30th, 2017 by Lou Wheatcraft No Comments

I was recently asked the question. “When a project begins with a existing device that has a TRL of 9 , with the goal to develop a miniaturized version of the device, is the TRL of miniaturized version of the … Read More

Requirements Experts has been acquired by Seilevel

Posted on: August 15th, 2017 by Lou Wheatcraft No Comments

I wanted to make all the readers of this blog aware that Requirements Experts has been acquired by Seilevel.  Seilevel, a training and consulting services company, has a long history of helping customers modify their approach to software requirements and product … Read More

INCOSE Guide for Writing Requirements – 2017 update

Posted on: July 15th, 2017 by Lou Wheatcraft No Comments

I am proud to announce that the 2017 update to the INCOSE Guide for Writing Requirements has been released for IS2017. We in the Requirement Working Group worked hard over the last two years on this update. “This Guide for … Read More

Implementation in Requirements – Internal Directive (i.e., Constraint) to use a Legacy Component.

Posted on: May 15th, 2017 by Lou Wheatcraft No Comments

We were recently asked the following question from one of our clients: “Our company is updating/replacing a legacy system.  The current system includes an embedded processor that was already built long ago and was developed without any requirements (at least … Read More

Levels of abstraction when writing requirements

Posted on: May 1st, 2017 by Lou Wheatcraft No Comments

Requirements Experts recently received an email from one of our clients seeking advice on levels of abstraction when stating requirements.  The email read as follows: “What are your thoughts on the use of “shall prevent” in a requirement. I believe … Read More