# Design Philosophy Most box generators that you can find on the internet allow you to specify the size of the box. Sometimes you have to give inside measurements and sometimes outside measurements. YAPPgenerator does this differently and starts from the printed circuit board for which you need a projectbox. The most important measurements are therefore the **length**, **width** and **thickness** of the printed circuit board. Then you specify where the holes are with which the printed circuit board should be secured. The holes can be used to secure the PCB with screws or you can clamp the PCB between the standoffs in the bottom and top of the projectbox. Then you can specify for all surfaces (lid, base, front, back, left and right) of the projectbox where rectangular and/or round cutouts should be placed. Finally, texts can be entered that will be printed at the lid of the projectbox. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://mrwheel-docs.gitbook.io/yappgenerator_en/design-philosophy.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.