I need an explanation for the part highlighted: The question is provided with an

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I need an explanation for the part highlighted:

The question is provided with an answer i only need to know

why the desired steady state value is 2.0?

Please show equation for the calculation not just a number!

Question 1. (a) Consider the block diagram shown below in Figure (A). The third order process shown in this figure is controlled by a simple proportional controller. What range of permitted values for the proportional gain Ke may be employed in this process? Estimate the percentage offset in the response signal that would be observed for a unit step change in the set-point if the maximum allowed value for the proportional gain was employed note: sN(s)-0 ass->0 and briefly describe a technique for plotting the root locus for this system. R(s)s) X(s) Ke Eigure (A + N(s) 0.5

Explanation / Answer

Offset is actually defined as the steady state error.

Steady state error (offset) = Setpoint - ultimate value

Here, in the problem it is given that the setpoint is proportional gain (Kc). So, here Kc = 2 which is setpoint which also desired steady state.

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