importance of training needs analysis or the important of data gathering for training need analysis

I want 2 study to literature review
– First one the importance of training needs analysis or the important of data gathering for training need analysis
– second one the importance of creat clear Timeline for any program or what the impact if there is no timeline of any project , something like this to show how the important of creat clear Timeline or time work flow
Note: each study must be literature review and use APA Style