Context Switching

Changing between tasks costs time beyond the interruption itself. That much is well established. Almost everything quoted about the size of the cost is not. Teams investigating the same pattern can use employee activity tracking to see where working time is being absorbed, then discuss the surrounding process; the record should reveal friction without turning ordinary pauses into a performance verdict.

What is actually supported

Returning to a task after a switch takes time, and the work does not resume at full speed immediately.

The cost rises with how different the tasks are and with how much held state the original task required.

Frequent short interruptions cost more in total than rare long ones, for the same total interruption duration.

And people are poor judges of their own switching cost, consistently underestimating it.

What is not supported

The specific figure often quoted — twenty-three minutes to refocus — comes from one small observational study and has been repeated far beyond what it can bear.

Percentage figures for "productivity lost to multitasking" have no stable source.

Treat any precise number here as decoration. The effect is real; its size is personal and not established.

Measuring your own

Count switches rather than timing recovery. Recovery time is hard to observe; switches are easy.

Automatic capture gives you this directly and is the one thing it measures well.

Or mark each switch in a diary with a stroke — no duration needed, just the count.

Switches per hour is a usable personal figure and it varies enormously between people and days.

What the count tells you

Under about four an hour, switching is probably not your problem.

Above ten, no amount of technique will produce sustained work and the structure has to change.

And the pattern matters more than the total: switches clustered in one hour are a different problem from switches spread evenly.

The self-inflicted share

A substantial proportion of switches are initiated by the person, not by anybody else.

Checking something, looking something up, the small avoidance at a difficult moment.

Counting these separately from external interruptions is the most useful split in this whole subject, because the two have completely different remedies.

Most people find the self-inflicted share larger than expected.

What actually reduces it

Removing the trigger rather than resisting it: notifications off, the tab closed, the phone in another room.

Batching similar work, within limits its own note covers.

A parking list: write down the thing you were about to go and check, and continue. This captures most self-inflicted switches at almost no cost.

And protecting one stretch rather than trying to protect the whole day, which is what makes the difference and has its own note.

What does not

Resolving to concentrate better.

Any technique that requires the switching not to happen, since most of it is external.

And tracking the switches without changing anything, which produces awareness and no improvement — a common and disappointing outcome.

What to check

How many switches in your last working hour — counted?

What share were started by you rather than by somebody else?

What is the trigger for the commonest self-inflicted one?

And is there one stretch in your week that is genuinely protected, or none?

The split that matters

Count switches you started separately from switches somebody else caused.

The two have completely different remedies, and most people find the self-inflicted share larger than they expected.

Worth keeping in mind

A parking list captures most self-inflicted switches at almost no cost: write down the thing you were about to check, and continue. The urge passes and the note takes four seconds.

In short

Under about four switches an hour, switching is probably not your problem.

Above ten, no amount of technique will produce sustained work and the structure has to change instead.

The point

Count switches rather than timing recovery: recovery is hard to observe and switches are easy.

Switches per hour is a usable personal figure and varies enormously between people. For a complementary perspective on work, measurement or planning, consult the OECD.