The \description command got renamed to \annotation in January
2001.
The 3D option is problematic in effort and schedule charts. It should be either
removed or fixed, depending on its usefulness.
Cutoff information is not supported for pert diagrams. Such a feature can be
implemented, if it is determined to be useful.
The options parameter of the \effortstyle command needs fixing.
The \schedulestyle needs more sophisticated labels. In particular, it should
allow to move the left-side labels to the right, and put at the left group labels.
(A possible application is a contributors’ schedule chart which is divided by
resources (persons), and for each person subdivided by tasks.)
Checking for validity of a project data is a memory consuming process. If
your environment is limited in memory, place the instructions \warningsoff
and \warningson before and after, respectively, the \newproject and
\endnewproject commands.