“what are the basic requirements to meet standards of 17025.from documentation till testing."
ISO 17025 provides general guidelines for the competence of testing and calibration laboratories. A laboratory working in accordance with, and seeking accreditation to ISO 17025 must implement policies, establish processes, set objectives and structure the management system to meet the requirements and adhere to the quality principles of ISO 17025. For example applying risk based thinking. There are certain mandatory requirements to establish processes, for documentation and records. Both Management and Technical competency must be demonstrated before accreditation. Your accredition body should make the criteria and checklists they will use, available to you; ahead of the audit so you can assess the gaps that may exist.