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Performance Load Examples (Item 2)

November 2, 2012 Leave a comment

Here are some examples primarily discussed in the authors Lidwell, Holden & Butler’s (2003) article on Performance Load.

Figure 1: How Slot Machines Work (Source: How Stuff Works, 2012)

First (1st) example is the Slot machines. Slot machines back when they were new, the user had to pull a rather large lever placed on either side of the slot machine to make the slot machine spin. Now days, the slot machine can easily be spun by a press of the button. This is relevant towards performance load with the kinematic load aspect. Reason being, is that instead of increasing your kinematic load by using more effort in pulling a lever, you now can press a button, decreasing your kinematic load.

Figure 3: Ignition Keys (Source: 1 A Locksmiths, 2009)

Second (2nd) example is the remote car keysCar keys are simple, you open the door by inserting the key into the car door lock and turning, thus opening the car door, same applies to turning on the engine. The introduction of the remote car keys has decreased performance load, specifically in kinematic load, by having a special set of buttons on the key that will unlock and lock the car doors while standing away at a distance. This helps when walking towards the car, pressing the button to unlock the doors, and simply opening the door and hopping into the vehicle, instead of increasing kinematic load and having to manually take your time opening the lock yourself.

Figure 2: Barcode (Source: Barcoding Inc., 2011)

Third (3rd) and final example of performance load is the bar code. Before bar codes were brought into existence, when purchasing a product, the cashier would have to type the products code into the computer themselves, increasing both the cognitive (remembering the digits) and kinematic (typing each digit into the computer). Now that the bar code has been introduced, the cognitive and kinematic loads have been significantly decreased, because now the cashier can simply swipe the product’s bar code across a scanner, scanning the digits into the computer themselves.

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