Optimal Microwaving with Fitt's μλ-Number

This trick will save at least five otherwise wasted minutes of your life if used religiously. This is intended as a joke, but yeah, I actually do this. :)

When pressing buttons on a microwave, “a lot” of time is wasted moving your finger around (as predicted by Fitt’s Law). You can regain these precious lost fractions of a second by modifying your button pressing behavior just slightly to minimize “costly” movements. The trick is to never press 0 (zero) on the microwave. Simply pick a number string of all the same number that is closest to your target time.

For instance if microwaving for 1 minute, which is normally 1-0-0, instead press 5-5 (55 seconds). You’ll be off a little bit but variations in microwave power make this negligible (when following directions on microwavable food for instance). Also, many microwaves allow input of seconds beyond 60sec (e.g. 00:88). So, in the above example 6-6 would work as well.

Given that cooking instructions are almost always in whole minutes, it’s generally pretty easy to translate to a same number sequence. Imagine all the time you’ll be saving now!

This table shows the sequence of 2- and 3-digit Fitt’s

μλ

-Numbers:

.

Fitt's µλ-NumberEquiv. Microwave TimeSecondsNearest Whole Minute

.

110:00:11110:00:00

.

220:00:22220:00:00

.

330:00:33330:01:00

.

440:00:44440:01:00

.

550:00:55550:01:00

.

660:01:06660:01:00

.

770:01:17770:01:00

.

880:01:28880:01:00

.

990:01:39990:02:00

.

1110:01:11710:01:00

.

2220:02:221420:02:00

.

3330:03:332130:04:00

.

4440:04:442840:05:00

.

5550:05:553550:06:00

.

6660:07:064260:07:00

.

7770:08:174970:08:00

.

8880:09:285680:10:00

.

9990:10:396390:11:00

This table shows Best Fitt’s

μλ

-Numbers for common whole minute cooking times, along with the error introduced in the approximation:

.

Desired MinutesSecondsBest Fitt's µλ-NumberCooking Time Error (abs)

.

0:01:0060558.3%

.

0:02:0012022218.3%

.

0:03:0018033318.3%

.

0:04:0024033311.25%

.

0:05:003004445.3%

.

0:06:003605551.4%

.

0:07:004206661.4%

.

0:08:004807773.5%

.

0:09:005408885.2%

.

0:10:006008885.3%

.

0:11:006609993.2%

Getting a bit more serious, here is an interesting discussion of keyboard shortcuts versus mouse menus that is somewhat related given the trade-off between memorization/mental effort versus simplicity of interfaces.

Keyboard versus Mouse

We’ve done a cool $50 million of R & D on the Apple Human Interface. We discovered, among other things, two pertinent facts: [1] Test subjects consistently report that keyboarding is faster than mousing. [2] The stopwatch consistently proves mousing is faster than keyboarding.

(Credit: Thom S. gave me this link a while back.)