In this example of the Human Factors Model, the Environment contains ambient illumination that may obscure the cell phone display screen, noise levels that may impede hearing, heat generation which may cause ear discomfort, and finally signal reception may be impeded by other frequency emitting devices or blocked.

The Human Sensory Component includes vision, which sees the cell phone displayed data, hearing, which detects rings and voice, and finally tactile, which senses phone vibrations.

The Human Cognitive Component attends to rings and vibrations or self-initiated calls, keeps intent in working memory, remembers how to use the phone, decides on action, and initiates motor action and responses.

The Human Musculoskeletal Component holds and manipulates the phone, manually depress the phone keys, and voice activates the phone.

The Machine Input Device Component receives data input via keyboard presses or voice.

The Machine CPU Component processes data, uses CPU memory to initiate responses to coded or programmed instructions, Sends information to the phone display, and recalls phone numbers from memory storage.

Finally, the Machine Display Component displays status information and instructions, and the Aural display transmits voice and rings back to the Human System.