The Data Centric Architecture of a Factory Digital Twin
CONTENTS 1 Introduction .................................................................................................................... 98 2 Structuring Data to Develop an FDT : The Resource Task Network ( RTN ) ......................... 100 3 Managing the Timeline is a Key Consideration for an FDT .............................................. 104 4 Infinite Dimensional Programming Innovation for Timeline Management ...................... 105
5 Real World FDT ............................................................................................................. 107 |
5.1 |
Realizing Value with a Digital Twin Step-By-Step .............................................................. 108 |
5.2 |
Example Applications of an FDT ....................................................................................... 110 |
5.2.1 |
FDT Analysis Example 1 ................................................................................................... 110 |
5.2.2 |
FDT Analysis Example 2 ................................................................................................... 113 |
5.2.3 |
FDT Analysis Example 3 ................................................................................................... 115 |
5.2.4 |
Specialized Process Constraints ....................................................................................... 115 |
5.2.5 |
Results .............................................................................................................................. 116 |
6 The Value of Factory Digital Twins ................................................................................. 117 7 Fundamental Challenge / Practical Lesson Learned .......................................................... 119 8 Conclusion .................................................................................................................... 119 9 References .................................................................................................................... 120 Acknowledgements ........................................................................................................... 121
FIGURES
Figure 2-1 : A diagram of a simple RTN . ..................................................................................................... 101 Figure 2-2 : An RTN for a multiple step manufacturing process . ............................................................... 102 Figure 5-1 : An example Gantt chart . ......................................................................................................... 109
Figure 5-2 : The predictions of the FDT can be published in the VirtECS / Symphony web-based environment ........................................................................................................................................................... 110
Figure 5-3 : Schedule predicted by VirtECS FDT . ........................................................................................ 111 Figure 5-4 : Schedule after inserting two demands for product Prod3 . .................................................... 112 Figure 5-5 : The addition of a second precursor equipment T2 . ................................................................ 112 Figure 5-6 : Equipment T1 contains transitions ( orange bars ) that reduce capacity . ................................ 114 Figure 5-7 : Campaigning to reduce transitions . ........................................................................................ 114 Figure 5-8 : The base case solution . ........................................................................................................... 116 Figure 5-9 : Addition of a 10 % probability of an 8-hour delay . .................................................................. 117
96 February 2025