control chart which discriminates between acceptable (as-planned) and non-acceptable (not-as-planned) variations of the … project’s schedule performance. Such control chart enables project managers to set more realistic thresholds leading to a … been presented to show how the ex ante control chart is constructed in practice. Furthermore, an experimental investigation …

alternative to the use of an X¯ chart. Motivated by the simplicity of this control chart and its good performance, the possibility … of using a similar chart, an npS2 control chart, to monitor the variability of a process was explored, and the results … are described in this paper. A comparison of the proposed npS2 control chart with the S2 and R control charts is presented …