| An ontological framework for clarifying flexibility‐related terminology via literature survey ET Ryan, DR Jacques, JM Colombi Systems Engineering 16 (1), 99-110, 2013 | 104 | 2013 |
| Investigation into the ratio of operating and support costs to life-cycle costs for DoD weapon systems GL Jones, ED White, ET Ryan, JD Ritschel Defense Acquisition Research Journal, 2014 | 60 | 2014 |
| A proposed methodology to characterize the accuracy of life cycle cost estimates for DoD programs E Ryan, D Jacques, J Colombi, C Schubert Procedia Computer Science 8, 361-369, 2012 | 18 | 2012 |
| 9.5. 1 Characterizing the Accuracy of DoD Operating & Support Cost Estimates ET Ryan, DR Jacques, JD Ritschel, CM Schubert INCOSE International Symposium 22 (1), 1335-1349, 2012 | 12 | 2012 |
| Tradespace and Affordability–Phase 1 B Boehm, JA Lane, K Sullivan, A Ross, R Madachy, R Nilchiani, S Rifkin, ... Systems Engineering Research Center (SERC), 2013 | 10 | 2013 |
| Cost-based decision model for valuing system design options ET Ryan Air Force Institute of Technology, 2012 | 8 | 2012 |
| A macro-stochastic model for improving the accuracy of department of defense life cycle cost estimates ET Ryan, CM Schubert Kabban, DR Jacques, JD Ritschel Journal of Cost Analysis and Parametrics 6 (1), 43-74, 2013 | 6 | 2013 |
| System Qualities Ontology, Tradespace and Affordability (SQOTA) Project Phase 5 B Boehm, D Jacques, J Columbi, E Ryan, T Ender, R Peak, V Sitterle, ... SERC Technical Report SERC-2017-TR-105, 2017 | 5 | 2017 |
| Taming the Hurricane of Acquisition Cost Growth–Or At Least Predicting It AJ Deneve, ET Ryan, JD Ritschel, CM Schubert Kabban Defense Acquisition Research Journal, 2015 | 5 | 2015 |
| Health monitoring impact on non-repairable component supply methods RM Vandawaker, DR Jacques, ET Ryan, JR Huscroft, JK Freels Journal of Quality in Maintenance Engineering 23 (1), 82-94, 2017 | 3 | 2017 |
| A cost-based decision tool for valuing DoD system design options E Ryan, D Jacques, J Ritschel, J Colombi Procedia Computer Science 16, 1180-1189, 2013 | 3 | 2013 |
| A more flexible approach to valuing flexibility ET Ryan, DR Jacques, JM Colombi Air Force Institute of Technology Wright-Patterson AFB OH Dept. of Systems …, 2011 | 1 | 2011 |
| System Qualities Ontology, Tradespace and Affordability (SQOTA) Project Phase 5 E Ryan, T Ender, M Curry, D Rhodes, A Ross, R Madachy, K Giammarco, ... Systems Engineering Research Center (SERC), 2017 | | 2017 |
| System Qualities Ontology, Tradespace and Affordability (SQOTA) Project–Phase 4 D Jacques, J Columbi, E Ryan, T Ender, R Peak, V Sitterle, M Curry, ... Systems Engineering Research Center (SERC), 2016 | | 2016 |
| -ilities Tradespace and Affordability Project–Phase 3 D Jacques, J Columbi, E Ryan, T Ender, R Peak, V Sitterle Systems Engineering Research Center (SERC), 2014 | | 2014 |
| JOURNAL OF PUBLIC PROCUREMENT, VOLUME 13, ISSUE 1, 103-132 SPRING 2013 ET Ryan, DR Jacques, JD Ritschel, CM Schubert PUBLIC PROCUREMENT, 103, 2013 | | 2013 |
| Valuing Flexibility Phase 2 A Deshmukh, B Boehm, T Housel, D Jacques, S Koolmanojwong, ... | | 2012 |
| 3.2. 2 A More Flexible Approach to Valuing Flexibility ET Ryan, DR Jacques, JM Colombi INCOSE International Symposium 21 (1), 263-278, 2011 | | 2011 |
