MIL-PRF-49503C (MI)
3.2 Operator Interface Requirements.
3.2.1 Test Program Structure. The test program structure shall be simple, logical, and
consistent. The selection of the dialogue used in the TP shall support the design structure.
3.2.2 Types of dialogue. The types of dialogue that shall be used are:
a. question and answer,
b. menu selection, and
c. function keys.
3.2.2.1 Question and answer. Questions shall be presented one at a time and shall not require
the operator to answer more than one question at once. When the system must ask a series of
questions, and the answer to the current question is dependent upon the answer to a previous
question, answers to all questions within the series shall be displayed until all questions have
been answered.
3.2.2.2 Menu selection.
a. Each menu display shall require only one selection by the operator.
b. The format of menu displays shall present only one option per displayed line.
c. The active area for menu option selection via touch screen shall be the area of the
displayed option label. The selection of a menu option for a non-touch screen shall be
accomplished by the operator positioning the cursor or mouse type pointer within the area
to be selected (the displayed option label) and then pressing either "RETURN" or
"ENTER" on the keyboard, or the left button of the mouse or trackball. If a mouse or
trackball is not available, arrow keys on the keyboard shall be used to position an on
screen pointer.
d. The menu display shall provide an immediate acknowledgment that an entry was
made.
e. Menu options shall be phrased as commands to the test set (computer), and not as
questions to the operator.
f. The displayed menu options working structure and syntax shall be consistent for all
TPs independent of the defined elements and structure of the command language chosen.
g. Each option code shall represent the meaning of the option. Codes shall not consist of
arbitrary alpha, numeric, or alpha numeric designations.
h. Menus shall display all options available at the current step in the test sequence.
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