Here is a more detailed description of the systematic review process.  Note the iterative nature of the process (arrows on the left).  Step 14 refers only to meta-analyses.

Tsafnet, G., Glasziou, P., Choong, M.K., et al. Systematic review automation technologies. Systematic Reviews 2014; 3:74;  http://www.systematicreviewsjournal.com/content/3/1/74.