Specifications

MIL-STD-1472E
5.15 .4.1.3 Accidental ttctuation. Provision shall be made to prevent accidental actuation of
potentially destructive control actions, such as accidental erasure or memory dump.
5.15 .4.1.4 Compatibility with user skill. Controls shall be compatible with the lowest
imticipa(ed user skill levels, Experienced users should have options which shortcut intervening steps
necessary for inexperienced users.
5.15.4.1.5 Availability of information. Information n=essary to select or enter a specific
control action shall be available to the user when selection of that control action is appropriate.
5.15 .4,1.6 Concurrent display. Control actions to be selected from a discrete set of alternatives
shall have those alternatives displayed prior to the time of selection. The current value of any
parameter or variable with which the user is interacting shall be displayed. User control inputs shall
result in a positive feedback response displayed to indicate performance of requested actions.
5.15 .4.1.7 Hierarchical Process. The number of hierarchical levels used to control
a process or
sequence should be minimized. Display and input
formats shall be similar within levels. The system
shall indicate the cuxnmt positions within the sequence at all times.
5.15 .4.1.8 User memorization. The user should not be required to learn mnemonics, codes,
special or long sequences, or special instructions.
5.15.4.1.9 DiaIogue Wpe.
The choice of dialogue type (e.g., form filling, menus, command
language) for interactive control shall be compatible with user characteristics and task requirements.
5.15.4.1.10 Number system- When numeric data is displayed or required for control input,
such data shall be in the decimal, rather than binaty, octal, hexadcximal or other number system.
5.15.4.1.11 Data rnanimdation. The user should be able to manipulate &ta without concern for
internal storage
and retrieval mechanisms of the system.
5.15.4.1.12 ComP
uter processing constraints. The sequence of transaction selection should
generally be dictated by user choices and not by internal computer processing constraints.
5.15.4.1.13 Feedback for correct inmtt. Control feedback responses to correct user input shall
consist of changes in state or value of those display elements which am being controlled and shall be
presented in an expezted and logically natural form. An acknowledgment message shall be provided
only where the more conventional mechanism is not appropriate or where feedback response time must
exceed one second.
5.15.4.1.14 Feedback foremoneous irtpu
t. Whezeco!lt! dinputerrorsaredetectedbythe
system (see 5.15.7.2), error messages shall be available as provided in 5.15.7.5, and emor rczovery
procedures shall be as provided in 5.15.7.8.
5.15.4.1.15 Control input data display.
The presence and location of control input data entered
by the user shidl be clearly and appropriately indicated. Data displayed should not mislead the user
with regard to nomenclature, units of measure, sequence of task steps, or time phasing.
5.15.4.1.16 t-ki~inator Idenuticat]on. hxcept tor broadcast commumcanon systems, the trans-
mit!cr
Pf cxh mcssflge in inter-user cnmmunirritinn~ dmuld he identified-- nll?omnriro!tj’,if prwsih}r