Form P078-0891b
AF-INT91.TXT

Ada Information Clearinghouse, 1-800-AdaIC-11 (232-4211), 703/681-2466

                        DEPARTMENT OF THE AIR FORCE
                         WASHINGTON DC 20330-1000

OFFICE OF THE ASSISTANT SECRETARY

                                                       05 APR 1991

MEMORANDUM FOR THE VICE CHIEF OF STAFF
               MAJOR COMMAND AND FIELD OPERATING AGENCY COMMANDERS
               PROGRAM EXECUTIVE OFFICERS

SUBJECT:  Interpretation of FY 1991 DoD Appropriations Act -
          INFORMATION MEMORANDUM

      The Congressional language of Public Law 101-511, Section 8092 
(Atch 1), requires the use of the Ada programming language "where 
cost effective."  This memo provides interim Air Force guidance on the 
interpretation of this language, pending issuance of
consolidated DOD direction.

      Since the Public Law mandates Ada, the determination of 
"cost-effectiveness" is interpreted to be the exception and not the norm.  As 
such, a full lifecycle cost analysis is required only when a software system 
is to developed and the proposed solution is one which requires a waiver in 
accordance with my August 7, 1990 memo (which remains fully in effect).  
Solutions which use COTS software or other software for which waivers are not 
required by the August, 1990 memo are deemed cost-effective for the purpose of 
compliance with the law.  When computing the lifecycle cost of an Ada tool, 
training, etc., must be amortized over all future anticipated Ada projects.  
In such cases the amortized amount of the total investment should not exceed 
50%, since the investment would be used for future projects.

      Questions on this matter may be referred to Col Hassebrock, HQ 
USAF/SCXS, DSN 223-2699.

                                    signed 05 April 1990

                                    LLOYD K. MOSEMANN, II
                                    Deputy Assistant Secretary
                                    (Communications, Computers,
                                    & Logistics)

1 Atch
P.L. 101-511, Sec 8092
(w/ accompanying report
language)

[See AdaIC flyer mandate.txt for the attachment]

                          **********************

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