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Archive for the ‘Ask the Experts’ Category


What is the difference between verification and validation? Part 2

Posted on: January 15th, 2016 by Lou Wheatcraft No Comments

This is the second of our two-part blog concerning verification and validation.  In part 1 we discussed the basic concepts of verification and validation in terms of the context in which they are used within the system development lifecycle. In … Read More

What is the Biggest Obstacle to Good Requirements?

Posted on: November 15th, 2014 by Lou Wheatcraft 4 Comments

I was recently asked the question: “What do you think is the biggest obstacle to good requirements documentation? I have been doing this for 25+ years and never see the end product match the requirements…..” I smiled when I saw … Read More

How to Communicate “Threshold” vs. “Objective” Requirements.

Posted on: July 30th, 2014 by Lou Wheatcraft 3 Comments

We were recently asked the following question: “For a system that has both “threshold” and “objective” requirements, what is the best way to delineate them? Our initial thought was to use “should”, but then we don’t want to get them … Read More

INCOSE IS 2014 was a great experience!!

Posted on: July 7th, 2014 by Lou Wheatcraft No Comments

It was great to attend the INCOSE 2014 conference this year!  We had a great time and  enjoyed meeting and talking with many of you! We hope your experience was rewarding and valuable as well. We would really like to … Read More

Writing requirements that refer to ambiguous standards

Posted on: June 15th, 2014 by Lou Wheatcraft 2 Comments

We were recently asked the following question: “I have a specific question about product requirements relating to standards that I’d like your input on:  Which requirement syntax is preferred? #1 or #2 1) “The System shall allow user to silence … Read More