Initial HPD work began many years ago when Parks**, an applied mathematician, joined Xerox and devised a (rigorous) Failure Rate Prediction Method for any situation. As she took on growing management roles in engineering, she saw that Variability was what drove most of the thousands of man-years expended on Product Development for clean-sheet mid-range to high-end products. I.e., engineers had to pervasively deal with Variability during Design Engineering/Technology Development, yet existing probabilistic methods were rudimentary and their knowledge even of that was quite lacking! This was also true for many major corporations, as she found from major inter-corporate interactions and conferences. Thus she left management, and started to conceive of the HPD Methodology & Software for addressing Design Analysis & Synthesis, probabilistically & holistically. Applications of early HPD showed remarkable results that cracked previously unsolvable major problems.
Realizing that HPD would be as applicable to all areas beyond Design Engineering (e.g., to Business, Bio-Engineering, Material Science) that need to address Variability, and would revolutionize Applied Mathematics, she joined University of Rochester (UR) as a Professor of Mathematics. Thus began the serious effort to fully develop & productize HPD.
**More on Parks' background: (i) Her pre-Xerox years dealt with classical (deterministic) Applied Math and Applied Mechanics. Although the Xerox work addressed much of the same classes of problems, comprehending pervasive effects of Variability significantly extended the scope of work content. The difficulty was compounded by the gross impossibility to analytically model most situations of complex Designs. Yet engineers must make decisions on thousands of parts that comprise a system which must meet a multitude of product performance specifications which as a whole must enable meeting an adequate level of customer satisfaction. This total set of challenges drove her to address all aspects of capabilities needed by engineers into HPD. (ii) Her Management years enabled her to fully understand Technology & Product Development, the CAD/CAE offerings, and the deficient "Design Practices" in use or being promoted for Design Engineering. This understanding further convinced her of the huge need for HPD.