Specifications

MIL-STD- 1472E
5,15 .3.8.1 ~., Audio displays maybe used as part of the user-computer interface, where (a)
the common mode of visual display is restricted by overburdening or user mobility needs and it is
desirable to cue, alert or warn the user, or (b) the user should& provided feedback after control
actuation, data entry, or completion of timing cycles and sequences.
5.15.3.8.2 Other
retirements. See 5.3.1, 5.3.2.1, 5.3.2.3 and 5.3.2.4.
5.15.3.8.3 SuPPortivc function. Audio signals used in conjunction with visual displays shall be
supplementary to the visual signals and shall be used to alert and direct the user’sattention to the
appropriate visual display.
5.15.3.8.4 Sigrid characteristics. Signals may be one time or intermittent. Intermittent signals
shall & automatically terminated when no longer applicable, and by operator control.
5.15.3.8.5 Frectuency. See 5.3.3.1
5.15.3.8.6 Audibility. See 5.3.4.1
5.15 .3.8.7 Alarm settin~. When alarm signals am established on the basis of userdefined
logic, users shall be permitted to obtain status information concerning current alarm settings, in terms
of dimensions (variables) covered and values (categories) established as critical. Alarm status
information shall be provided in monitoring situations where responsibility maybe shifted from one
user to another as in changes of shift.
5.15.4 Interactive control.
5.15.4.1 General Control actions should be ~ consistent, make
minimal memory
demands of the user and be suffwiently flexible to adapt to different
user needs Diabgue types should
be compatible with anticipated task requirements and user skills. System response times should
accommodate dialogue type and mpirements for user training (= Table XXVIII).
5.15.4.1.1 ReaPoIlae
*. System rqonse times shall be consistent with operational
uirements. Required user response times shall be compatible with requhed system response time.
?&dred user response times shall be within the Iimits imposed by total user tasking expected in the
operational environment. (See 5.15.9)
5.15 .4.1.1.1 Resmonsetime induced keyboard lockout. If computer processing time requires
delay of concurrent user inputs and no keyboard buffer is available, keyboard lmkout shall occur until
the computer can accept the next
mmsaction. Anakrtshall redisplayed toindicate totheusesti
lockout has
OCCUHed.
SJ.S4L1.L2 l@lLeJl
~c~ ~~ corqputer is ready to continue, following
rqmnse time-induced keyboard lockout, a signal to so indicate shall be pmented, e.g., cursor
changes back to normal shape.
5. i5.4.l.l.3 ~
t, When keyboard lockout has occurred, the user
should be provided with a capability to abort a transaction that has resulted in an extended Iockout.
Such capability shoukl act Mean UNDO command that stops ongoing processing and does not
RESET he c~wpwel thereby htiug prior proccs.i.ng.
5.15.4.1.2 SimpIici[v. ConU’OIMkSptayrt!hllxmbp shaikbe ~ tmdmtpkkit.
(’ontro! actions shall he simp!e and direct, whereas potential y destructive control actions shall require
extended user mtentirmsuch they are not easlty acted on.
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