Avoid using a 1 unless specifically instructed to do so in the schedules or in the CSM. If youfind that it is absolutely necessary, never use it as the final digit of a cutter because youmight have to use a zero in the cutter for the next resource. Instead, add another digit.And finally, avoid using a 2 if at all possible. Using a 2 can force the use of a 1, which canforce the use of a 0.