The success of a program of slug tests is primarily a function of a series of design decisions, some of which are made long before the tests are performed in the field. The response data from a slug test are measurements of the deviation of head from static conditions. The aspects of the well screen of relevance for slug tests are the size of the openings, the percent of open area relative to the total surface area, the length of the screen, and the nature of the inner surface of the screen. The primary goal of well-development activities for slug tests is to remove drilling-related debris, products of biochemical action, and readily mobilized fine material from the near-well portions of the formation. The most common approach is to compare the K estimate obtained from the slug test with other information collected as part of the site investigation.