chapter  8
27 Pages

C H A P T E R 8

8.1 INTRODUCTION

The point is, that there are many aspects of such projects which, by their very nature, cannot be planned for in an expectable sense, as with the laws of mechanics and other engineering sciences. Some allowance must be made for those things which can never be known in advance, and for those contingencies which may arise during the course of the work. Although some processes are known to be stochastic (fluctuating about a steady or level value) and can be treated with a full degree of statistical confidence, there are also those which can only be assigned certain probabilities-which is to say, the laws of chance pertain.