This document discusses the process of estimation in construction projects. It defines estimation and lists the necessary abilities of an estimator such as vision, innovative thinking, and technical knowledge. It describes the different types of estimation including thumb rule based, approximate, and scientific estimation. Scientific estimation is affected by factors like plans, material selection, specifications, price catalogues, site conditions, and availability of skilled workers. Estimation requires tools like blueprint reading, knowledge of standard rate of items, materials selection, and an understanding of how time and working conditions impact labor costs. The total cost of a project includes material costs, labor costs, and overhead charges.

1. By:
Prof. Ranjit Kumar Parmar
ELECTRICAL ENGINEERING DEPARTMENT
GOVT POLYTECHNIC JUNAGADH
Electrical Dept Govt Polyytechnic Junagadh

2. Estimation
 Definition
 Think and tell
 Purpose of Estimation
 What should be the minimum abilities of estimator?
 Vision
 Innovative thinking
 Technical knowledge
 Site info
Electrical Dept Govt Polyytechnic Junagadh

3. Estimation
 Think and tell Importance of estimation in real life..
Electrical Dept Govt Polyytechnic Junagadh

4. Types of Estimation
 1. Thumb rule based
 2. Approximate estimation
 3. Scientific estimation
 Comparison of above methods
Electrical Dept Govt Polyytechnic Junagadh

5. Factors affecting Scientific
estimation
 Plan, Drawings etc
 Calculation of material required
 Specifications
 Price catalogue
 Site condition
 Availability of skilled workers
Electrical Dept Govt Polyytechnic Junagadh

6. Contd..
 Market aspects of material
 Selection of material
 Transportation facilities
Electrical Dept Govt Polyytechnic Junagadh

7. Estimation tools
 Blue print reading
 Maths?
 Material selection
 Info about SOR
 Laws?
 Does time matter?
Electrical Dept Govt Polyytechnic Junagadh

8. Total Cost
1. Material Cost
 Price Catalogue
 SOR
Electrical Dept Govt Polyytechnic Junagadh

9. Total Cost
2. Labor cost
 Hyper skilled
 Skilled
 Semi skilled
 unskilled
Electrical Dept Govt Polyytechnic Junagadh

10. Total COst
3. Over head charges
 Office or admin charges
 Salary of staff, bonus , amenities etc
 Transportation
 Telephone, electricity Internet bills etc.
 Legal issues
 Maintenance
 Taxation
 Interest on depreciation
 Profit…too to be counted….!!
Electrical Dept Govt Polyytechnic Junagadh

11. Effect of Working condition on
labor cost
 City or Village
 Open space or constructed
 Distance b/w work place & Residence
 GF or higher floors
 Working time
 Season
 Physical & Mental condition
Electrical Dept Govt Polyytechnic Junagadh

12. Thank you..
Electrical Dept Govt Polyytechnic Junagadh