Good milestone characteristics the criteria are unambiguous and do not need much explanation.

Input Tools and TechniquesOutput Corporate Environmental FactorsOrganisation's Process AssetsActivity InventoryActivity Inventory AttributesResource AvailabilityExpert Judgment MethodReplacement OptionsIdentify publicly available estimating dataProject Management SoftwareBottom-up Estimating Activity Resource RequirementsUpdated Activity AttributesResource Breakdown StructureUpdated Resource Calendar Change Requests