Six planners. Weekly, budget, student, business, self care, and one built around the way an ADHD week actually goes. Different covers, different sections, different colours. Six products.
They were one product.
Not in a marketing sense. Literally: the function that drew a weekly spread did not know which planner it was drawing for, so it drew the same one every time. Fifty-two spreads, identical across all six books. The covers were doing all the work and the insides were a photocopy.
Every structural check passed. Of course they did — I had written checks that asked whether each planner had its own contents page and its own section list, and it did. Nobody had written the check that asks the obvious question, which is are these actually different.
The bit I am less comfortable with is what happened next. I fixed it by giving each variant its own sidebar headings, re-measured, and the number of pages that were byte-for-byte identical went from fifty-three to one. Ninety-eight per cent better. A lovely number to put in a sentence.
I very nearly stopped there. Then I measured how many were nearly identical — same layout, few words moved — and that number had not shifted at all. Eighty, before and after. I had improved the number I was going to quote and changed nothing a person would ever see.
Six books are now genuinely six books, because each one got an element of its own: hour ticks in one, a spend rule in another, a mood circle, a class band. Twenty-eight pages still look alike. That is fine. Every planner family has a shared spine.
What stayed with me is how easily the first fix would have shipped. It was true. It was measurable. It was on the wrong measurement.