Plan Realistically as a Founder: What Research Says About Why Projects Take Longer
"I told them two weeks, and it has been six."
I hear that sentence from founders who promised a launch date to a client, a team, or themselves, and watched it slip again. If you have ever told yourself that this time the plan is realistic, you are in very good company, and psychologists have measured how often people underestimate how long their own projects will take.
Why It Is Hard to Plan Realistically as a Founder
When you run the business, you are optimistic by necessity. Starting something takes a belief that it can succeed, and that hopeful outlook tends to follow you into the calendar. Each new project feels cleaner than the last one, with fewer surprises and a clear path to the finish.
There is also pressure to promise quickly. Clients want dates, teammates want deadlines, and a short estimate sounds confident, while a longer one can feel like admitting weakness. So the number you share is often the one that feels best to say, and the work then has to catch up to it.
What Research Says About How to Plan Realistically as a Founder
In 1994, Roger Buehler, Dale Griffin, and Michael Ross published a set of studies in the Journal of Personality and Social Psychology on what they called the planning fallacy. In the first study, 37 psychology students working on honors theses were asked when they would finish.
Among the 33 whose results could be analyzed, the average prediction was 33.9 days, and the average time it actually took was 55.5 days. Only about 30 percent finished within the time they had predicted. Even when the students imagined that everything went as poorly as it possibly could, their average guess was 48.6 days, and only about half of them finished by then.
The researchers then tested what might help. In a later experiment with 123 students, one group was asked to recall specific past experiences that were relevant to the task before predicting. In that group, the average prediction matched the average actual time of 7 days, and about 60 percent finished on time, compared with about 29 percent in the control group. In another experiment, outside observers who were given the same information predicted longer completion times than the people doing the tasks.
A few cautions belong here. The participants were mostly psychology undergraduates, and the first study came from a single honors thesis course. The authors note that their recall exercise reduced the optimism without making the predictions more accurate for each individual, so they could not confirm that remembering the past improves accuracy.
The recall effect may also reflect thinking about other possible scenarios, and not the use of past experience. None of these studies involved business owners. Even so, the common thread may be useful: people tend to picture the plan and not the delays, and bringing past experience to mind appears to temper that optimism.
Signs You Need to Plan Realistically as a Founder
These signals come from what I see in coaching, and they are everyday observations rather than a clinical checklist:
Your launch dates keep sliding. The date you shared a month ago has already moved twice.
You assume this project will go smoothly. The last three projects had surprises, and you plan this one as if it will not.
You say yes to a deadline before you have broken the work into pieces. The date comes first, and the task list comes second.
Your calendar has no gaps for things going wrong. Every hour is assigned, so one delay moves everything else.
If several of these feel familiar, a more realistic planning habit may spare you a lot of stress.
How to Plan Realistically as a Founder With Your Own Past Data
Look at your last three similar projects. Write down how long each one took from start to finish, and compare those numbers with what you had estimated. The recall condition in the research suggests that bringing real past experience to mind can temper optimism.
Start your estimate from the past, not the plan. If your last three launches took six weeks, begin there, and ask what is different this time before you shorten the number. Changing the number needs a reason you can name.
Break the work into small pieces. List the steps, estimate each one, and add up the total. A task list makes hidden steps visible, such as approvals, revisions, and waiting on other people.
Add a buffer and say so. Add a cushion of 20 to 30 percent as a starting point, and tell the client or the team that the date includes room for the unexpected. This percentage is a coaching rule of thumb of mine, and no study has tested it for founders.
Ask a peer how long it would take them. The observers in the study predicted longer times than the people doing the tasks. Someone outside the project may spot steps you have skipped past, and it gives you a second number to weigh.
What This Looks Like in Practice
I've coached a founder who ran a small web design studio and told me she promised every client a two-week turnaround, and nearly every project took four. She was a gifted designer and a cheerful optimist, and the late projects left her apologizing more often than she liked. We looked at her last six projects together and found that the average was just over four weeks, mostly because of client feedback and revisions.
She began quoting four weeks, with a clear client feedback schedule written into each proposal, and she told me clients seemed relieved to have an honest timeline. Some projects still ran late, and she handled those with less panic because the buffer was already there. The business was the same size, and she spent far less time apologizing.
In my experience as a life coach, the founders I work with who deliver steadily tend to base their estimates on how past projects actually went and give the plan room to breathe.
Your optimism is a strength, and pairing it with your own track record is a simple way to keep your promises.
Ready to Plan With Confidence?
If you recognize this pattern and want a steady place to build timelines that fit your real life, you do not have to figure it out alone. Book a Free 30-Minute Chat with Asi Efros to talk through a plan that fits you.
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