If the situation cannot produce IFR zero in the real-world (after appropriate analysis do not simply assume this is not possible), the relevant next set of questions are twofold. To get there we will need to go through some definitions first.
- Best Possible Solution (BPS) - The best possible combination of a systems configuration given the system exists; or, the best next step in the direction of the IFR.
If it is not possible to realize the IFR at this stage, analysis should be conducted concerning the BPS with a focus on the systems ideality and output value.
|
Variable |
Name |
Description |
|
I |
Ideal (Ideality) |
The efficiency of a system diminished by its problems, and/or harm. An Ideal system would perfectly transform the desired inputs into the desired outputs with no problems, and no harm. |
|
V |
Value |
The benefits of a system diminished by its cost. A perfect system would deliver maximum benefits with no cost. |
|
E |
Efficiency |
The system's actual output compared to the output required to achieve value. |
|
B |
Benefits |
System output that is as expected; positive. |
|
C |
Costs |
A real expense, loss, or penalty; money or time. |
|
P |
Problems |
System complications or output that is negative, bad, or unhelpful. |
|
H |
Harm |
A real damage or injury. |
|
A |
Actual Output |
The output of the system as produced in the real world. |
|
R |
Required Output |
The output of the system as defined to deliver its value. |