MIL-HDBK-1908B
Human Factors test and evaluation (HFTE) acq. Part of the system testing effort conducted in accordance with approved test plans. HFTE includes all testing directed toward validation and evaluation of human factors analyses, studies, criteria, decisions, and operational and maintenance design characteristics, and features. These may include engineering design tests, model tests, mockup evaluations, demonstrations, and subsystem tests conducted to verify system level requirements. Human factors tests are a part of system developmental test and evaluation and operational test and evaluation.
Human performance gen. A measure of human functions and action in a specified environment, reflecting the ability of actual users and maintainers to meet the system's performance standards, including reliability and maintainability, under the conditions in which the system will be employed.
Illuminance gen. A measure of the amount of light falling on a surface. The metric unit for illuminance is lm/m2, or lux (light flux). (See "Metric equivalents, abbreviations, and prefixes.")
Impulse noise snv. A short burst of acoustic energy consisting of either a single impulse or a series of impulses. The pressure history of a single impulse includes a rapid rise to a peak
pressure, followed by a somewhat slower decay of the pressure envelope to ambient pressure, both occurring within 1 second. A series of impulses may last longer than 1 second.
Information uci/gen Organized data that users need to perform their tasks successfully. Information serves as an answer to a user's questions about data and implies effective assimilation of data by a user. Data that have been processed and formulated by automated or manual means to satisfy a knowledge requirement for use by a decision maker.
Information system gen. A system, whether automated or manual, that comprises people, machines, and/or methods, organized to collect, process, transmit, and disseminate data that represent user information.
Information system uci. A computer-supported, task-oriented tool designed to help users perform defined information handling tasks.
Input uci. (1) The data entered into a computer for processing, (2) the process of entering data or
(3) pertaining to the devices that enter data. (See "Control entry" and "Data entry.")
Intermediate level maintenance acq Maintenance that is normally the responsibility of, and performed by, designated maintenance activities for direct support of using organizations. Its phases normally consist of calibrating, repairing, or replacing damaged or unserviceable parts, components, or assemblies; modification of material, emergency manufacturing of unavailable parts; and providing technical assistance to using organizations. Intermediate maintenance is normally accomplished by the using commands in fixed or mobile shops.
Interaction uci. See "Transaction."
Interface uci. A common boundary between automatic data processing systems or parts of a single system, or between equipment(s) and a user. (See "User-system interface.")
Interrupt uci. Stopping an ongoing transaction in order to redirect the course of the processing. Examples of interrupt options are ABORT, BACKUP, CANCEL, and RESTART.
Job acq. See "Task analysis."
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