A more realistic estimate begins with the work you have actually done, the conditions you face and the uncertainty you still need to understand.
By Arbab Naseebullah Kasi, Chief Executive Officer - CEO, Feel Worldwide Foundation Inc.
The full route is longer than the first glance suggests: a painted metaphor for realistic planning.
There is a familiar kind of disappointment that begins with a perfectly reasonable-looking plan. Three tasks fit neatly into the afternoon. Each seems manageable. By evening, the first is still unfinished, the second has become urgent and the third has quietly moved to tomorrow.
The temptation is to make the next plan more demanding. Start earlier. Concentrate harder. Stop taking so long.
Sometimes a change in how we work is useful. Sometimes the estimate was asking an ordinary day to behave like an ideal one.
Planning becomes more helpful when we treat time estimates as claims that can be checked. How long has similar work taken before? What does the new task include? Which parts depend on someone else? What could we learn before committing to a finish date?
Those questions make room for ambition without requiring us to pretend that the work is smaller than it is.
An estimate deserves evidence
A classic study offers a useful caution. In research published in 1994, Roger Buehler, Dale Griffin and Michael Ross asked 37 University of Waterloo psychology students to predict when they would submit their honours theses. Among the 33 whose completion times were included in the analysis, the average best estimate was 33.9 days from the survey. Actual completion took an average of 55.5 days. Four students were excluded from that analysis because they had not finished when tracking ended. Original planning-fallacy study
This was a small, historical study of a particular academic task. It does not tell us to multiply every estimate by the same number, or establish that everyone underestimates every activity.
Its practical challenge remains worth considering: a sincere prediction can be quite different from what eventually happens. The feeling that an estimate is realistic is not enough to make it so.
When you notice a repeated gap between your plan and the result, investigate the gap before turning it into a judgment about yourself.
Name the finish you are estimating
“Prepare the application” might mean collecting the required information. It might mean writing a first draft. It might mean submitting a checked application with every attachment accepted by the system.
Those are different finishing points. A time estimate can be reasonable for one and misleading for another.
Before assigning a duration, describe what will exist when the task is complete. Include the checks that matter. If a document needs someone else's approval, distinguish “ready for review” from “approved and sent.” If a purchase needs delivery, distinguish “ordered” from “available to use.”
Consider an explicitly illustrative task: preparing a two-page community newsletter. Writing the main text is only one possible unit of work. Gathering dates, confirming names, obtaining permission for an image, arranging the layout and checking the final file may also belong to the assignment.
You do not need a complicated project chart for a small newsletter. You do need an estimate that refers to the same task you intend to complete.
This is especially important when discussing time with another person. A short explanation of the finishing point can prevent two people from agreeing to the same date while imagining different deliverables.
Look for a comparison that is genuinely comparable
Think of a few recent tasks that resemble the new one. If records are available, use them instead of relying only on your impression of how quickly the work went.
An illustrative example makes the distinction clear. You remember writing a short report in an hour. The saved drafts show that the writing took one focused session, but checking the figures and incorporating feedback happened over the following two days. Which part of that experience is relevant to the promise you are now considering?
Choose comparisons with similar demands. A report based on familiar material is different from one requiring new research. Reusing an approved design is different from developing a new one. A task you completed with help is different from the same task undertaken alone.
Public institutions use this principle on a much larger scale. HM Treasury's supplementary guidance, published in April 2013, advises basing adjustments to project cost, benefit and duration estimates on past or similar projects, with allowance for the characteristics of the current project. Its formal adjustment percentages are intended for public-project appraisal, not personal calendars. HM Treasury's optimism-bias guidance
For everyday planning, the useful question is simpler: what evidence supports the belief that this task will be faster than the comparable ones?
A new tool, clearer materials or a smaller scope may provide a good answer. “This time will be different” needs a little more explanation.
Separate working time from waiting time
Some tasks require only a modest amount of your attention but occupy several days on the calendar.
You might need half an hour to request information, an hour to prepare a draft after it arrives and another short session to make corrections. The overall finish still depends on when the information and feedback become available.
In an illustrative volunteer project, preparing a poster might require two hours of design work. If the event location is unconfirmed and the organizer cannot review the draft until Friday, promising the final poster on Wednesday does not become realistic because two hours are free on Tuesday.
Write down the dependency. Ask when the needed input is likely to arrive. Where possible, agree on an interim version or identify work that can proceed independently.
Also check your own available time. A six-hour task does not fit into a week merely because the week contains many hours. Which hours are actually available after existing commitments, travel, meals and rest?
The University of Washington's Disability Resources for Students encourages students to test their estimates and consider their whole lives, including both time and energy demands. Its guidance recognizes that a realistic plan differs from person to person. That is a useful reminder to plan around actual circumstances rather than an imaginary standard worker. University of Washington planning guidance
You do not need to disclose private circumstances to explain every estimate. You can state the availability or support you need without sharing more than you wish.
Let uncertainty remain visible
Some work is familiar enough to estimate fairly closely. Other work begins with unanswered questions.
If you have never used the software, do not silently assume that learning it will take no time. If the source material has not arrived, do not assume it will be complete. If several people must agree on a decision, do not treat their agreement as an invisible step.
A range can be more informative than an exact-looking number, provided you explain what affects it. For example, an illustrative estimate might be three to four working sessions if the records are complete, with a revised estimate needed if substantial information is missing. Those numbers are examples of communication, not a recommended allowance.
Avoid hiding uncertainty inside a generous deadline that nobody understands. Explain the important assumptions and when you will know more. That allows another person to decide whether to reduce scope, obtain missing information or adjust the sequence.
Where a deadline cannot move, the useful conversation becomes what can responsibly fit within it. A fixed date does not make an uncertain workload disappear.
Try a small estimate-and-check exercise
You can begin without tracking every minute of your life. Choose one recurring task where inaccurate estimates regularly create friction.
McGill University's student learning resources provide a public example of this approach. Its time-task estimation exercise asks students to list tasks, estimate their duration and record how long they actually take. It also asks them to consider assumptions and constraints. This is published educational guidance, not evidence that the exercise produces the same improvement for everyone. McGill's time-estimation exercise
For your own experiment, record the task's boundaries alongside the time. Note whether you counted interruptions, waiting or only focused work. Use the same meaning when you compare attempts.
Suppose, in an illustrative example, you estimate 30 minutes to prepare a routine update. It takes 50 because you have to locate three figures. On the next occasion, the figures are ready and the task takes 35 minutes. The lesson is more specific than “I am always slow.” Having the inputs ready changes the task.
After a few attempts, look for a practical adjustment. Perhaps you need a more realistic allowance. Perhaps you need a preparation step. Perhaps the task is not as consistent as its familiar name suggests.
Keep this exercise proportionate. Its purpose is to improve a decision, not create another demanding system to maintain.
Update the estimate when the facts change
An estimate made before starting may need revision once the work reveals something important. A missing document, a changed requirement or an unexpected technical problem can alter what completion requires.
When other people depend on the result, share the change while they still have options. State what changed, what it affects and what you can now reasonably say about the next step.
You can also acknowledge when your original estimate omitted something. A clear correction is more useful than repeatedly promising that the work is almost finished.
After completion, ask one final question: what should the next estimate know about this task? Keep the answer brief enough to use again. The point is to make experience available at the moment of planning, rather than leaving it behind once the immediate pressure has passed.
A realistic plan can still be hopeful. It gives important work enough space to happen and gives the people involved a clearer understanding of what they are agreeing to.
Which recurring task in your life deserves an estimate based on what it actually takes, rather than how quickly you wish it could be done?
