Question

Following is the rank priority among 5 steps (C, D, E, F and Y)

? F

Additionally,
- Steps E and F always come before Step Y
- Step C always comes before Step D
- C and D are not consecutives steps
Which step of the process should be carried out first?
Step C


Step E


Step D


Step Y

Answer 1

To determine the order of the steps based on the given conditions, let's summarize the constraints:

1. Step F is ranked (unknown priority) but comes before some other steps.
2. Steps E and F always come before Step Y: \( E, F \rightarrow Y \)
3. Step C always comes before Step D: \( C \rightarrow D \)
4. Steps C and D are not consecutive.

Based on these constraints, we can establish the following order:

- Since E and F must come before Y, we have: **E, F, Y**.
- C must come before D, and they cannot be consecutive.

Now let’s consider the order:

1. **C** must come before **D**.
2. **E** and **F** must both come before **Y** but can occur in various positions relative to C and D, as long as they all follow the rules stated.

Let’s analyze the positions of C and D with respect to E, F, and Y based on the fact they cannot be consecutive. The only scenario that fits all requirements is:

1. Step E
2. Step F
3. Step C
4. (Step D cannot go directly after C, so it must go after some steps, ideally after E and F)
5. Step D
6. Finally, Step Y

One valid order could be: E, F, C, D, Y

So, the first step in the process is **Step E**.

Thus, **the first step of the process that should be carried out is Step E**.