The process of experimentation is what makes Computer Science "science"!
- which other options you also tried, but which failed
- write down hypotheses that explain the worse results of the other options
- write down hypotheses why the chosen options gives better results
- ideally formulate testable predictions that these hypotheses imply
- etc.
Simply saying "other alternatives were tried and those happened to work" is not science, but tinkering around combined with magical thinking.
The process of experimentation is what makes Computer Science "science"!