ABSTRACT
During planning and design the geotechnical engineer must anticipate the behavior of the tunnel under several scenarios. His ability to predict this behavior is critical to cost estimation as well as on time delivery. A knowledge gap is almost always present between what is obtained by the principal during the design phase and what is required by the contractor for equipment purchase and construction. Many principals and contractors underestimate the im-portance of the geotechnical input this does not become apparent until the project starts to run into cost and time overruns. This paper sets out to provide both a reference to project managers as to when and what input they should seek from geotechnical engineers and give guidance to geotechnical engineers on how to present information to project managers so that they can make smart decisions around project management, reducing disputes and ultimately providing better outcomes.
