This Webel IT Australia trail is based on an existing example problem from the SysPhS-1.1 specification. As always, any inconsistencies, issues, or concerns reported here are offered most constructively and with thanks to the original specification example creators.
It is assumed you've already worked through the more detailed previous sections of this larger technology assessment trail, and you now know basically how SysPhS works, so we'll move through this smaller example with fewer explanations about those underlying aspects.
But please don't just skip this section as there are some "catches" of spec model errors and some useful observations about best modelling practices.