Contents preface (VII) introduction 1—37

6.5.2.3. Sources of Maintenance Data
The data to be used in preparing maintenance plans may originate from one of the following :

• 
  reports from field personnel
  

• 
  inspection report from superior officers
  

• 
  performance measurement data, and
  

• 
  research reports on maintenance (material, equipment, method)
  

6.5.2.4. Work Plan Preparation
The following matters are to be usually included in the maintenance work plans :

• 
  contents of work plans
  

• 
  type of maintenance
  

• 
  period of plan
  

• 
  definition and extent of work
  

• 
  estimates of cost
  

• 
  schedule
  

• 
  methods of execution (departmental, contact-labour/material)
  

• 
  assignment of responsibilities
  

• 
  principles in light of policy
  

• 
  maintenance of services
  

• 
  approval, and
  

• 
  notification and liaison
  

248 IRRIGATION AND WATER RESOURCES ENGINEERING