1. Generalized Reuse Model for COSYSMO Workshop Outbrief
October 18, 2012
Gan Wang, BAE Systems
Ricardo Valerdi, University of Arizona
Garry Roedler, Lockheed Martin
Mauricio Peña, Boeing

2. Workshop Participants
Name Organization
Rick Selby USC / Northrop
John Dixon Lockheed Martin
Dan Ligett Softstar Systems
Lori Saleski BAE Systems
Reggie Cole Lockheed Martin
David Zubrow SEI / CMU
Peter McLoone Lockheed Martin
Qi Li USC
Arlene Minkiewic Price Systems
Gan Wang BAE Systems
Ricardo Valerdi University of Arizona
Mauricio Pena USC/ Boeing

3. Overview Goals: Summary:
Expand to a more comprehensive (qualitative) framework to further understand, capture, and evaluate reuse in systems engineering
To understand the investment perspective
To address some of the potential gaps
Lead to quantitative evaluation through enhancing the reuse model in the Cost Estimating Relationship (CER) of COSYSMO 2.0
Summary:
Presented a brief history of COSYSMO evolution in reuse
Introduced the Generalized Reuse Model concept
Design with Reuse (DWR) and
Design for Reuse (DFR)
Defined the model categories and proposed equation
Solicited feedback from the participants on a matrix of required systems engineering activities as they relate to the reuse of artifacts

4. Take-Aways: Reuse Approach
COCOMO II treats reuse
a cost driver, to account for the extra tax associated with designing for future reuse
a sizing adjustment parameter, to account for designing with reuse
Need to explore both the strategic and opportunistic approaches (and everything in the middle), no projects truly exist at the extremes
A typical system will have both DWR and DFR SE products
Take some elements that are going to be reused, and
Develop some elements to be reusable

5. Take-Aways: Investment in Reuse
The willingness to invest in planned reuse comes down to incentives on the decision-makers
Near-term investment for future gain
One program view vs. product line approach
Tradeoff: reusability and affordability
Point designs vs. envelope design
Approaches that will lead to investments in reusable products
Lobby the customer to provide reusability requirements
Make the case internally for investment in reusability
Use product line ROI if applicable

6. Reuse Validation How do you validate reuse?
Establish capability envelopes
Evaluate the proposed system against the capability envelopes
“You don’t know its reusable until the third program uses it”
Need to create a metric for the pedigree of reusable components based on how many times they’ve been reused before

7. Feedback & Next Steps Feedback on the model / framework Next Steps
Modified the matrix of systems engineering activities based on participant feedback
Added a category called “no DFR”
Next Steps
Will send the updated matrix to workshop participants to receive their input on the correlation between activities and artifacts for reuse
The correlation matrix will be utilized to develop a first-cut at weights for the different DWR and DFR categories
The weights will then be evaluated using expert judgment