MIL-PRF-49503C (MI)
(Copies may be obtained from https://www.ieee.org/web/publications/home/index.html or from
the Institute of Electrical and Electronic Engineers, IEEE Service Center, 445 Hoes Lane, P.O.
Box 1331, Piscataway, NJ 08855-1331.)
2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a
conflict between the text of this document and the references cited herein, (except for related
specification sheets), the text of this document takes of this document takes precedence. Nothing
in this document, however, supersedes applicable laws and regulations unless a specific
exemption has document, however, supersedes applicable laws and regulations unless a specific
exemption has been obtained.
3. REQUIREMENTS.
3.1 Operator Automatic Test Equipment (ATE) Interface.
3.1.1 Standard design. A test program (TP) (see 6.5.4) shall be written so that:
a. the system is easy to operate.
b. the current status of the TP is evident to the operator.
c. the system responds to each operator input.
d. the next operation is easily determined.
3.1.2 Software structure. The TP structure shall provide context, consistency, and flexibility to
the operator in executing the test program set (TPS) (see 6.5.6).
3.1.3 Display design. The software structure and display design shall be a transparent interface
between the operator and the task. It shall appear to the operators that they are directly acting on
the screen representations and the Unit Under Test (UUT) without interference from the TPS.
3.1.4 Interface design objectives. The interface design shall be understandable, learnable,
controllable, mappable, responsive, tolerant, and flexible.
3.1.4.1 Understandable.
a. The operator shall be able to move through to. The TP shall provide the operator a
means to be able to move through the various functions of the TP while maintaining and
understanding the test.
b. Information shall be presented in clear representations.
c. There shall be a consistent use of terminology throughout the TP.
d. Information that is essential to making a decision or performing an action shall be
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