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

def ramp_plan(start: int, target: int, step: int) -> list:
    if start > target:
        start, target = target, start
    return [start + i * step for i in range((target - start) // step + 1)]
```