Download presentation
Presentation is loading. Please wait.
Published byBrent Welch Modified over 9 years ago
1
1PBI_SAS_08_Exec_ShullSeptember 2008MAC-T IVV-08-153 Dr. Forrest Shull, FCMD Kurt Woodham, L-3 Communications OSMA SAS 08 Infusion of Perspective-Based Inspections for NASA IV&V (Executive Briefing)
2
2PBI_SAS_08_Exec_ShullSeptember 2008MAC-T IVV-08-153 A procedural technique incorporating three best practices: Giving each reviewer a particular and unique focus (or perspective) on the document under review Base perspectives on document stakeholders to help understand necessary participants, relate inspection tasks to development skills Making individual review of a document an active (rather than passive) undertaking Articulating the quality aspects of interest Uses defect analysis (e.g. from bug trackers, configuration management systems, previous inspection, or test results) as one input on which to customize a solution Perspective-Based Inspection (PBI)
3
3PBI_SAS_08_Exec_ShullSeptember 2008MAC-T IVV-08-153 History 2001-2003: SARP research funding Refined basic approach, implemented on NASA projects and in classrooms, measured results 2004: Tech infusion with Flight Software Branch / GSFC Goal: Produce new Branch standards Success metric: Based on experiences on pilot(s), how much of the recommended process is adopted by Branch? 2004: Tech infusion with United Space Alliance / JSC Goal: Reduce defect slippage over current increment Success metric: Show reduced defect slippage on PB-inspected artifacts 2007-2009: SARP funding for improved general inspection planning Other Results and Benefits Improved defect detection effectiveness substantially (NASA & elsewhere) Helped re-invigorate inspection practices Forms the basis of industrial and academic training Perspective-Based Inspection (PBI)
4
4PBI_SAS_08_Exec_ShullSeptember 2008MAC-T IVV-08-153 Tailoring required for new domain, new issues, new artifacts Adopting PBI for IV&V Requirements Specifications PB Inspection System reference model PB Inspection Requirements defectsModel defects
5
5PBI_SAS_08_Exec_ShullSeptember 2008MAC-T IVV-08-153 Adopting PBI for IV&V: Tailoring Process Understand team-specific quality concerns Understand likely perspectives for the team Refine set of perspectives and define procedures for each. E.g., What quality concerns map to which perspectives What is a feasible/effective process for checking those concerns Finalize procedures and provide training Analyze ongoing inspection results (and update procedures if necessary) Monitor downstream defect profile Write final report Status: Reviewed sample models & processes; Constructed draft PBI techniques; Created draft training course
6
6PBI_SAS_08_Exec_ShullSeptember 2008MAC-T IVV-08-153 Initial perspectives for this domain: Modeler Uses requirements & existing models to create the next iteration Quality foci: Appropriate level of detail in requirements; completeness and clarity of requirements & models; consistency and correctness of models Domain expert Assesses whether model accurately and usefully captures domain Quality foci: Correctness of requirements (independent of models); identification of stakeholders and evaluation of usability from their POV; checking flow of control & use of reusable components Quality assurance Assesses whether models and system can be validated properly Quality foci: Handling of exception cases / unexpected system conditions; robustness of system; testability Adopting PBI for IV&V
7
7PBI_SAS_08_Exec_ShullSeptember 2008MAC-T IVV-08-153 Validate & refine PBI instantiation via interviews Check perspectives and associated scenarios with key stakeholders Flesh out detailed approaches for each perspective with respect to each defect category Application In context of IV&V of JWST Training course material delivered and training will be executed near- term Technology provider will facilitate initial inspections, and will be on- call during subsequent inspections Evaluation Success metric: Effectiveness of PB inspection in comparison to past inspections Path Forward
8
8PBI_SAS_08_Exec_ShullSeptember 2008MAC-T IVV-08-153 Forrest Shull fshull@fc-md.umd.edu 301-403-8970 Contact information Kurt Woodham Kurt.Woodham@L-3com.com 757-644-5807
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.