@article{long_ferguson_2021, title={Assessing Lifecycle Value Using Object-Based Modeling by Incorporating Excess and Changeability}, volume={143}, ISSN={["1528-9001"]}, DOI={10.1115/1.4048218}, abstractNote={Abstract}, number={5}, journal={JOURNAL OF MECHANICAL DESIGN}, author={Long, Daniel and Ferguson, Scott}, year={2021}, month={May} } @article{long_morkos_ferguson_2021, title={Toward Quantifiable Evidence of Excess' Value Using Personal Gaming Desktops}, volume={143}, ISSN={["1528-9001"]}, DOI={10.1115/1.4049520}, abstractNote={Abstract}, number={3}, journal={JOURNAL OF MECHANICAL DESIGN}, author={Long, Daniel and Morkos, Beshoy and Ferguson, Scott}, year={2021}, month={Mar} } @article{long_ferguson_2020, title={Studying Dynamic Change Probabilities and Their Role in Change Propagation}, volume={142}, ISSN={["1528-9001"]}, DOI={10.1115/1.4046674}, abstractNote={Abstract}, number={10}, journal={JOURNAL OF MECHANICAL DESIGN}, author={Long, Daniel and Ferguson, Scott}, year={2020}, month={Oct} } @inproceedings{long_ferguson_2017, title={A case study of evolvability and excess on the B-52 stratofortress and FA-18 hornet}, DOI={10.1115/detc2017-68287}, abstractNote={The moment a system is put into service it begins to lose value as technological and societal changes accrue while the system is frozen in the state it was constructed. System decision makers are faced with the choice of accepting a decline in performance, updating the design, or retiring the system. Each time a decision maker faces these alternatives, the value of the available options must be evaluated to determine the preferred course of action. A design that can adapt to changes with minimal cost should provide more value over a longer period than a system that is initially less costly, but less adaptable. This is especially desirable for systems that have large initial costs and/or a lengthy development cycle. The purpose of this paper is to evaluate the United States Air Force (USAF) B-52 Stratofortress and the United States Navy (USN) F/A-18 Hornet to characterize the changes in desired capabilities and what system attributes allowed them to either successfully adapt or prevented them from adapting. These observations allow the development of heuristics that designers can use during system design to enhance system lifetime value.}, booktitle={Proceedings of the asme international design engineering technical conferences and computers and information in engineering conference, 2017, vol 4}, author={Long, D. and Ferguson, S.}, year={2017} }