Battlefield data is collected in great details including enemy war fighting tactics , Air Combat maneuvering , combat formations , payload delivery accuracy , survival techniques , in flight communication , technical failures , performance at different altitudes , temperatures , pilot fatigue , ejections , kill ratio , radar locks and performance , air to air missile accuracy or failures/altitude performance , launch and recovery times slots , night time navigation , technical issues per sortie , air intelligence data , enemy wreckage identification and recovery etc
All of the above is collected from a war situation then it is analyzed by qualified analysts who then help devise strategies for better survivability , superior tactics and air combat maneuvering , situational awareness , electronic countermeasures against enemy hardware , technical & operational capability analysis of enemy fighters , their payload efficiency , response time , altitude performance , engines , radar & heat signatures , command and control psyche and doctrine etc.
After analyzing the data , the developed tactics , countermeasures , strategies are embedded in future combat pilot training programs to prepare pilots better for future engagements hence updating raw battlefield knowledge by knowing enemy air craft and pilots strengths and weaknesses. Such updated regimes are then implemented throughout courses fighter pilots take to update their skills. All of this is put to the test during air exercises between different air forces , tested , evaluated and refined. This is how schools like Topgun in USN , Combat Commanders School in PAF and many others train their best pilots.
I hope it helps.
