What is Importance of pilot survey during a large survey?

1. Alert the surveyor to any difficulties that were not anticipated to the survey method stage. 2. Ensure that proposed methods and procedures Will work properly in practice before being applied to the large, expensive investigation. 3. It provide an opportunity to the surveyor to prepare for adjustments and revisions before investing in. 4. Gather information prior to a larger study to improve the later's quality and efficiency. 5. Reveals deficiencies in the design of the procedures and experiments that were to be applied to the main study. 6. The importance of pilot survey becomes more clear when it is able to detect a flaw in the proposed method and gives an awareness for a more careful planning.