Final answer:
When using vibration as the method of consolidation, the measure must be filled in three approximately equal layers to ensure even compaction.
Step-by-step explanation:
If vibration is the method of consolidation, the measure must be filled in three approximately equal layers. This ensures that the vibration will be effective throughout the volume of the material without any parts being over-consolidated or under-consolidated. The process involves using a vibrating tool or machine to consolidate materials like concrete in each layer before adding the next, which helps to eliminate air pockets and ensures even compaction and strength. This technique is commonly used in concrete construction projects.