```python
def ramp_step(current: int, target: int, step: int) -> int:
    if step == 0:
        raise ValueError("Step cannot be zero.")
    if current > target:
        return target
    return min(target, current + step)

def ramp_plan(start: int, target: int, step: int) -> list:
    if start > target:
        return [target]
    elif start < target:
        return list(range(start, target + 1))
    else:
        return [start]
```