According to Dr. Goldratt all (for profit) systems are subject to (market-, resource-, policy-) constraints. If not then any company would enjoy infinite sales and infinite profits, which is not the case.
In addition: (corporate) organizations are systems with dependent links (through subordination and through policies). The consequence of this is counterintuitive: there are no “complex” organizations since there are always limited independent variables in systems with dependent links (or limited degrees of freedom)!
If we find the constraint, the bottleneck, the weakest link or the few independent variables of a system/enterprise and if we FOCUS our improvement efforts on these “Archimedean points”, then we can induce significant changes to these systems/enterprises in typically short time frames.
The core of Dr. Goldratt’s Theory of Constraints is nicely explained in chapter 11 of his business novel "Critical Chain" available as excerpt here [38 KB].
A more elaborate explanation of ToC can be found on Dr. Kelvyn Youngman’s homepage.
Here is a text database [1.449 KB] with posts/contributions in the world wide web (edited) around Dr. Goldratt's Theory of Constraints.
The blogs are mainly in English with some German sections mixed in between. The different topics are all preceded by a "+( " string and sorted alphabetically. The intention to post this here is to share info with those interested in the Theory of Constraints.
The intention is not to break copyrights.