Purpose
一般而言,只有一个standard sequence,来代表linear production steps; 如果有其他的sequence,那就是predecessor and successor,称为alternative or parallel (at the same time)sequence.
例如在mechnical engineering中,在final assembly的steps中,可以让不同的component同时发生produce.
同时可以定义alternative sequence, 然后例如根据lot size或capacity来决定走alternative sequence;
Content:
以下是一个简单的关于parallel sequence的例子。alternative sequence是一样的道理。
Standard sequence:
Parallel sequence
现在还只有standard sequence:
创建新的sequence
先定义alignment key: 用来align最后的时间(standard seqence与parallel)必须一样:
然后reference sequence: 0 (refer standard);branch:也为0(从开始);return为20
然后再operation:
现在再看sequence: