Identify the true statements about the theory of constraints. (Check all that apply.)

A) The theory of constraints is a management philosophy developed by Eliyahu M. Goldratt.
B) It focuses on identifying and alleviating bottlenecks in production processes.
C) The goal of the theory of constraints is to maximize the throughput of the entire system.
D) It suggests that improvements made to non-bottleneck areas will always lead to increased overall productivity.
E) The theory of constraints advocates for the use of excess inventory to buffer against disruptions in the production process.