This project was done to develop the necessary analytical information to allow preparation of an operational business plan for a newly proposed Center of Excellence in Extremity Trauma at Brooke Army Medical Center, Fort Sam Houston, Texas. Army wide extremity trauma workload available from PASBA for the five year period June 1989 to May 1994 was analyzed to develop understanding of market potential and demographics, diagnostic mix, trends and to estimate potential ADPL. Additional information extracted from MEPRS combined with staff input allowed development of a five-year operating cost estimate. A total of 14,244 extremity trauma related cases occurred, 10,338 of which had a primary diagnosis of extremity trauma, 38% were visceral complications; 27% open fractures or dislocations; 24% extremity prostheses, 8% were amputations; 2% were crushing injuries and 1% involved burns to extremities. Of these cases 42% were active duty, 18% active duty dependents, 17% retiree dependents and 16% retirees. Workload was found to be geographically focused in the South Central and South Eastern regions of the country, based upon patient residence. Texas had significantly the most cases, 300 more than any other state. The average extremity trauma patient was 36.7 years old, and 72% were males. Army wide case mix index was 1.49 while that for MEDCENs was 1.83. The ALOS was 17.3 days of which 9.5 days were spent in in-house acute care beds, 2.2 were convalescent bed days, 3.2 were in medical hold, 0.4 days in critical care and an additional 1.7 days in other facilities external to Army MTFs.