UX Case study that cover 1.5 year is it fine or better to divide into the short parts?

I'm writing a case study for work that I've done in my current company at 1.5 years. All case studies that I saw describe a specific feature or first launch, so timelines there always 2-5 weeks. And I'm wondering is it okay to write a case study that will cover High-level Goals that we get to in a 1.5 year?