The interoperability with MES or Manufacturing Operations Management (MOM), is still a dream for the future, as is also a bidirectional exchange with process simulation. If those subjects would be pursued, another wealth of benefits would be in reach. The work on the bidirectional interface between CAE tools and PCS shows that what was regarded as unlikely can become reality very quickly, when vision, interpersonal skills and multi-party cooperation coincide. The same is true for interoperability between CAE and MOM or process simulation. Standardisation