Good Systems · public information library

Why is it so hard to get back to a task after an interruption?

People come here to understand why something in everyday life feels harder, different or more costly than it should — and what might make it work better.

Short answer

Getting back to a task after an interruption is hard because the interruption can wipe out the small decisions and details that told you what to do next.

What this can look like

You may be interrupted by a call and come back unable to remember which number mattered or why you opened a file. The return can take longer than the interruption itself.

Why it can happen

Before you switch, leave yourself a handover note: what you were doing, what matters, and the next physical action. This is not overkill. It lets you return without rebuilding the task from scratch.

What might help

Leave a handover note before you switch. Use this shape: “I was…; next I will…; I still need…”. Keep it in the document, not a separate system. If interruptions are constant, ask whether messages can wait for a set check-in time or whether you need protected focus time.

What the research helps explain

A systematic review found that interruptions can affect task-completion time, resumption lag, decision-making and errors. Task-switching research similarly shows a cost when people move between mental task sets.

What can vary

An expected interruption with a clear return cue may be easier than an unexpected one. If interruptions are constant, the problem may be the work design rather than your personal system.

For this situation

For you, use one sentence before switching: “Next: compare page two with the brief and mark the missing number.”

More info and original sources

Poko summarises the relevance of public original sources and links out for anyone who wants to read more.