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384 Rates, Constraints, and Movement
Comprehensive example
However, this initial effective rate for the first rate section is only temporary. Since the Storage tank's capacity is finite and since Rate Section 2's effective rate is only 5 FPT, the Storage tank will eventually become full. Once this happens, the effective rate of 10 FPT in Rate Section 1 can no longer be maintained. Consequently, the Storage tank introduces a relational constraint that requires its inflow effective rate (Rate Section 1) to be less than or equal to its outflow effective rate (Rate Section 2). Once the Storage tank is full, its relational constraint causes the effective rate through Rate Section 1 to be reduced to 5 FPT.
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