Description of The Wedge Model™
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 […]
Articles & Presentations
Requirements Analysis that Works!
Innumerable studies have concluded that requirements problems are the single biggest contributor to cost overruns, schedule slippages and loss of capability in systems […]
Building a Great “Work” Breakdown Structure
Let’s get one thing straight. A “Work” Breakdown Structure (WBS) isn’t a breakdown of work. WBS is a really, really bad name. A “Work” Breakdown Structure is actually a […]
Requirements in Context
What is a requirement? An excellent place to look for a definition is always a universally recognized dictionary. Too many times we redefine terms because we can, and then we end up adding to the plethora of […]
Does Systems Engineering Work?
Systems Engineering (SE) practitioners and researchers have claimed many benefits of applying SE including improved product definition and development and […]
Finding The Right MBSE Tool
Choosing the right MBSE tool is a challenge that many of us have to face at one point or another. With the work performed by the INCOSE SE Tools Database Working […]
VOC Is Great! QFD Is Not!
A client asked me during the week why I do not advocate the use of Quality Function Deployment (QFD). I feel the answer is important, so here goes. The main reason is that QFD weights Measures of […]
Systems Engineer or Systems Engineering? Part 1
Editor’s Note: On the 13th of June 2020, PPI’s Managing Director published an article about the concept of systems engineers versus systems engineering. This topic […]
A set of requirements 132 years old
I owe this one to my colleague Paul Davies, who unearthed a set of requirements from 1888, 132 years ago, by the UK company Barr and Stroud. Barr and Stroud was a […]
Integrating PM and SE: Summary of Articles Originally
by Ralph Young SyEN 54 – June 21, 2017 Main challenge of the book: how to successfully bring together two established and valued disciplines to accomplish a critical […]
Comparison of PPI’s Football Diagram vs MIL-STD-499B Draft Fig B, 6 May 1994
Commonalities: 1. PPI’s Football Diagram uses the same graphical concept. Differences: 1. MIL-STD-499B makes no provision for concurrent (simultaneous) engineering. PPI’s […]
Benefits of Model-Based Systems Engineering
I am sometimes asked about the benefits of model-based systems engineering (MBSE) design methods. The model-based design (MBD) aspect of MBSE is a way of helping get design right the first time […]
