These are the general stages that you would undertake during a systematic review - a systematic literature review may not undertake all these stages.
Planning and conducting a systematic review can be a considerably time intensive research project.
How long the overall review will take depends on the scope of the review, size and availability of the review team.
A well-designed systematic review may take a year or more to complete.
The Cochrane Handbook for Systematic Reviews of Interventions gives the following table indicating the estimated time for each element of a systematic review.
|1 - 2||Preparation of protocol|
|3 - 8||Searches for published and unpublished studies|
|2 - 3||Pilot test of eligibility criteria|
|3 - 8||Inclusion assessments|
|3||Pilot test 'Risk of bias' assessment|
|3 - 10||Validity assessments|
|3||Pilot test of data collection|
|3 - 10||Data collection|
|3 - 10||Data entry|
|5 - 11||Follow up of missing information|
|8 - 10||Analysis|
|1 - 11||Preparation of review report|
|12 -||Keeping the review up-to-date|