Find what the user will do most often, and then make it the easiest.
For example: I have a long personal manuscript with a microwave design.
Many require you to set a watch that you never use for anything before using the microwave, and it forgets every time it loses power. This requires 10 keystrokes on these hard-to-reach buttons.
A simple usability test will mean that the most common cook time used on microwaves is the standard “minute” and the multiplicity of this. An ideal microwave oven should therefore be able to cook for 1 minute at high power with 3 or less actions.
Within a few minutes, but within 5 minutes from the golden minute “1”, there should be several more steps, but this is not so important, and only a significant number of actions are required for the cooking time> 5 minutes. (which is pretty rare)
2 examples of a large microwave design
1. 4 parts. Door, temperature dial, timer, lighting sequence
The temperature dial is analog and is retained from the previous setting with a variable acceleration range.
The timeline is digital, but simulated analog, clockwise rotation increases the hours of operation of the clock (shown by the sequence of lighting under the dial). Turning the dial counterclockwise reduces the time in hours. Cooking reduces time in hours.
The door closes, and time on the clock begins to cook. Opening the door pauses cooking.
standard work: open the door, load, turn the time, close the door (or, if desired, close the door again, and cooking starts as soon as> 1 s on the watch)
2. 6 parts, door, dial, power button, start button, reset button, digital time display
The start button without a selected time starts cooking for 1 minute at high power.
The start button during cooking adds 1 minute of time.
Temporary dialing is maintained between sessions. Turning the dial causes the time stored in the dial position to be copied to the digital timer.
Pressing "power" before starting cooking will
- if the dial has not been rotated, copy the current time stored in the dails position to the digital timer.
- if the dial has been rotated, decreases the power level selection by 1 or, if at the lowest power level, returns to the highest.
Pressing the power during cooking reduces the power level on the fly.
standard operation: 1 minute in height = start of pressing.
1 minute medium high = press the start button, press the power button.
2 minutes - press the start button twice.
<at any time> in high = mode, rotate the disk all the way, press the "Start" button.
<anytime> on & any anypower> to turn the disk until it becomes happy, press the power button all the way, press the "Start" button.
<preselected time> at high values = press power, press start button
<pre-selected time + 1 minute> at high values = pressing force, press the start button twice.
As you can see here, adding a small number of additional buttons, you can add more expressiveness and functional design.
Any design with a numeric keypad for time specification, as a rule, does not meet my criteria for a good design.
He noted that these projects may, for some people, have a higher learning curve, but as soon as they learn, muscle memory makes him instinctive. In contrast to the more (obvious?), But overly complex projects that even scientist users will have to spend a tedious amount of time repeatedly to perform tedious arbitrary operations, simply to achieve common goals.