The cost models described in appendix II can be used to make a rough estimate of how long a system development may require.
Appendix 2 describes various cost models
The time it takes for a system development can't be estimated.
The girl sat on the court waiting for her friends.
It is suggested that you do nothing.
People are waiting at the door.
This person is jogging down a hill.
The earnings of the future works would be substantially drained due to the proposed programs.
A man is picking fruit on a mountain pass.