> For the complete documentation index, see [llms.txt](https://nicolas-heron.gitbook.io/droolsonboarding/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://nicolas-heron.gitbook.io/droolsonboarding/brms/design.md).

# Design

We are going to divide our rules in 5 steps and do a rule-flow which mean a process : 1. init step : we shall determine the age of each person and the person has his birthday based on the quoting date. 2. standard price : as we have the table with all prices, we shall make a decision table of it. 3. Promotion : if there are more that 4 persons and the youngest is between 3 and 18 years old 4. Reduction : birthday and If people are living in Zurich 5. Calculate the total

The data model we are going to use is as follows :

![](https://2162667257-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M-FWW6zn6BoLbrPp_j8%2F-M-FWXeF2rB74vmY-cqZ%2F-M-FWd8O55OOYNsmCm8I%2Faction09.png?generation=1580825263533187\&alt=media)