Articles & Presentations

Read interesting and informative short articles relevant to systems engineering and projects.

Articles & Presentations

Avoiding Unintended Interactions Between Elements of a System Solution

A client this week asked me a question along the following lines (I’ve edited the question a little to protect the innocent): Imagine my top level system is an existing civil aircraft Now the engine manufacturer introduces a new build standard (design) of the engine. Note that the engine interacts with a number of primary […]

Reflections on the INCOSE International Symposium 2021

I have a saying, “The two best ways of spending a week on systems engineering are firstly to participate in PPI’s 5-day systems engineering class, and secondly, to attend (is that still the right word?) the annual INCOSE International Symposium (IS)”. My participation in the IS over July 19-22, 2021 has not changed that view. […]

What is Systems Engineering?

I am often asked, “what is systems engineering?”. My detailed reply if called for is along the lines: Systems engineering is a set of principles and supporting methods, based on systems thinking, for the successful engineering of solutions to problems. The approach is based on related process elements that are selected and integrated for use […]

A PPI Description of Systems Engineering

PPI has produced a number of definitions of systems engineering at different levels of abstraction and for use in different contexts. One PPI answer to the question ‘what is systems engineering?’ follows. Systems engineering is a set of principles and supporting methods, based on systems thinking, for the successful engineering of solutions to problems. The […]

What is The Wedge Model™? (VIDEO)

In this live-recorded webinar and Q&A session, PPI Managing Director Robert Halligan demonstrates how to apply the Wedge Model™ to your engineering projects to reduce risk and increase success. The Wedge Model™, a substantial elaboration of NASA’s Vee Model of the 1960s, is a framework for the application of verification and validation within large projects to […]

Requirements Analysis that Works!

  Introduction: Innumerable studies have concluded that requirements problems are the single biggest contributor to cost overruns, schedule slippages and loss of capability in systems and software projects. Cost impacts alone of 10%, 20%, 50%, 80% and more are regularly reported by practitioners and researchers. And yet, the cost of making substantial improvements in requirements […]

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