Do you ever find yourself wondering what the data was you used in a project? When was it obtained and where is it stored? Or even just the way to run a piece of code that produced a previous output and needs to be revisited?Chances are the answer is yes. And it’s likely you have been frustrated by not knowing how to reproduce an output or rerun a codebase or even who to talk to to obtain a refresh of the data - in some way, shape, or form. The problem that a lot of project teams face, and data scientists in particular, is the agreement and effort to document their work in a robust and reliable fashion. Documentation is a broad term and can refer to all manner of project details, from the actions captured in a team meeting to the technical guides for executing an algorithm.  In this bite episode of DataCafé we discuss the challenges around documentation in data science projects (though it applies more broadly). We motivate the need for good documentation through agreement of the responsibilities, expectations, and methods of capturing notes and guides. This can be everything from a summary of the data sources and how to preprocess input data, to project plans and meeting minutes, through to technical details on the dependencies and setups for running codes.