-It describes the approach that a small group of people can
-use to develop and integrate a large software system.
-It then describes the three step methodology used to
-engineer a clean, correct, and coherent release.
+Each release cycle is divided into an initial development phase
+followed by a release engineering phase.
+The release engineering of the distribution is done in three steps.
+The first step has an informal control policy for tracking modifications;
+it results in an alpha distribution.
+The second step has more rigid change mechanisms in place;
+it results in a beta release.
+During the final step changes are tracked very closely;
+the result is the final distribution.