Why your weekly plan breaks by Wednesday

The plan was written for a week that never comes

Weekly plans usually break because they are written for an ideal week, where every task takes the time you hoped and nothing new arrives. The fix is to plan less of the week, size tasks from how your recent weeks really went, and expect to re-plan once.

On Sunday evening the week looks open. You can see your meetings, the school run and the report due on Thursday. You cannot see the colleague who is off sick, the call that comes at four, or the task that turns out to be twice the size.

So every gap gets a task. By Tuesday one gap has gone. By Wednesday the tasks are piled into each other, and you are behind before Thursday starts.

We plan from hope and explain away the past

Psychologists have a name for this: the planning fallacy. A 1994 paper by three psychologists, published by the American Psychological Association, tested it on a variety of academic and everyday tasks. People's predictions of when they would finish were too optimistic.

The paper also suggests why. When people thought aloud while forecasting, they talked mostly about how the task would go in future, not how similar tasks had gone before. When they explained past forecasts that had failed, they blamed causes outside themselves that were temporary and specific to that occasion.

You can see the same habit in a working week. Last week's plan broke because of a sick colleague, so it does not count. The week before was an inspection, so that does not count either. Every broken week becomes a one-off, and the next plan is written as if none of them happened.

Plan from last month, not from Sunday evening

The same paper points to a remedy. In its fourth study, the optimistic bias disappeared for people who were asked to connect their predictions with relevant past experiences. The study involved single tasks, not whole weeks, but the habit is easy to try with your own plan.

Before you plan next week, look back at the last three or four. A calendar, a diary or your sent emails will do. A rough pattern is enough.

• How much of each week went to work that was never on the plan?
• Which kinds of task always overran: writing, marking, admin, anything waiting on someone else?
• Which day usually went wrong first?
• Which of the reasons you gave yourself keep coming back?

Decide how much of the week to plan at all

Split the week into three kinds of time. Fixed time is what you cannot move: lessons, shifts, appointments, collecting children. Chosen time holds the few things you most want done. Open time is deliberately left empty.

Write the fixed time in first. Then choose no more than three outcomes for the week and give each one a block of chosen time, sized from your record rather than your hopes. Leave the rest open.

How much to leave open depends on your job. If you answer to a classroom, a ward or a customer queue, you will need more open time than someone whose diary is their own. A fair starting point is the share of time your last month lost to unplanned work. If roughly a day a week went that way, leave a day's worth of open blocks spread across the week.

Open time is where the surprises go, so they stop landing on top of the planned work. In a calm week it becomes time for the next thing on your list.

One week, planned two ways

Take a fictional head of English with two young children. Her first plan fills every free period with moderation, a curriculum review, two parent calls, a set of Year 11 mocks and a training session to prepare.

On Tuesday a colleague is absent and she covers two lessons. On Wednesday a pastoral concern takes her lunchtime and her afternoon. By Wednesday evening four tasks have moved to Thursday, which already had three of its own.

Before planning the next week, she looks back over the month. Cover landed on her in three of the four weeks, nearly always in the afternoon. Cover is part of her job, so her plan needs room for it.

So her second plan names three outcomes: mocks marked, training prepared, parent calls made. Each sits in a morning. Two afternoons stay open. When cover comes again, it fills an open afternoon and the three outcomes still happen.

What to do in the ten minutes after the plan breaks

Expect to re-plan once a week. Take ten minutes on the day the plan stops matching the week, ideally before you leave work.

• Write down what is left of your three outcomes, and nothing else yet.
• Choose the one that matters most by Friday and give it the best remaining slot.
• Move the second to a named day, or to next week, on purpose.
• Drop or hand on the third if it no longer fits, and tell anyone who was expecting it.
• Keep at least one open block in the days that remain.

Keep a record so the next plan is smaller and truer

On Friday, spend ten minutes comparing what you planned with what happened. Note which estimates were wrong and by roughly how much. Note what arrived unplanned, and resist calling it a one-off until a month of notes says it was.

Keep these notes in one place. After a month you will know your own weeks better than any template does. Plans written from those notes will be smaller and closer to the truth.

Any notebook will hold them. OTO Life, coming soon from OTOvios, will bring your agenda, goals, routines and wellbeing together in one place.