Surplus causes disequilibrium in the supply and demand of a product. This imbalance means that the product cannot flow through the market efficiently. However, the cycle of surplus and shortage has a way of balancing itself out.
Environmental scanning is the term used to describe the acquisition and use of information gleaned from sources external to your company. Scanning can be thought of as a form of early-warning radar that lets managers look into the future.
Environmental scanning and forecasting in strategic planning: The state of the art. Long Range Planning, 14(1), 32-39. Brown, A., & Weiner, E. (1985). Supermanaging: How to harness change for personaI and organizational success.