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

def ramp_plan(start: int, target: int, step: int) -> list:
    result = []
    if start > target:
        start, target = target, start
    while start <= target:
        result.append(start)
        start += step
    return result
```