Approximate Estimating

• No approximate estimate can be any better than the information on which it is b ased . An estimate based on inadequate information can be precised . 
• Realistic approximate estimating can be achieved only when full cooperation and communication between architect , quantity surveor and building client from the inception of the scheme . 
• Choice of method employed will be influenced b the information and time available , experience of the quantity surveyor and the amount and form of the cost data available to him . 
• Essential to carry out a detailed survey before a preliminary estimate is prepare as it would quite unrealistic to assume that the site is level and free from obstructions .