While not an exact science, examination of the ratios of various weightlifting ratios can help a lifter identify what areas to focus on in their programming. For example, the suggested optimal ratio for the snatch compared to the clean and jerk is 0.78 – 0.83. If a lifter C&Js 100kg but only snatches 70, they would likely benefit from shifting program focus to addressing the relative weakness of their snatch.
Many weightlifting coaches have suggested optimal ratios of different lifts to analyze weaknesses in these lifts. The following excel document allows for easy calculation of weightlifting ratios and comparison to suggested optimal ratios. The sources listed in the document also provide good resources for understanding why your specific weaknesses might exist.
INTERESTED IN LEARNING MORE ABOUT THE SNATCH??? READ MY ARTICLE IN CROSSFIT JOURNAL ANALYZING SNATCH TECHNIQUE HERE
edit: updated version created by someone else using my base template https://docs.google.com/spreadsheets/d/1_Ijd3EA-QjZGEyym-iW66Mh1BgCSTW3jUB_6jtA6NYo/edit?usp=sharing