National EMSC Data Analysis Resource Center
Assessing your needs will help you better determine where you will want to focus your data cleaning efforts.
Remind yourself of the overall objectives of your project.
Once you have identified the objectives of your project, you will need to establish the key data necessities. For this step, end-users and the data manager will need to compare the list of objectives with the actual dataset to see what pieces of data can be used. Because your needs will often fluctuate, this should be done for each individual project, even if the same data subset is used.
The following is a list of some typical data necessities: