Given that your audience is your customer, and they understand the “why” behind the problem, the “Current Situation” narrative is not the right thing here.  Instead, this should be of a more technical flavor, and not a narrative or story.  So, this is likely a from-scratch section, though likely not from a clean sheet.  That is, there is useful content in the “Problem Understanding” section (latest version is in the PTR), though not all of it nor verbatim.  So, start with that, and flesh it out a bit.  This need not (should not) be long.  But, it is also important that you update it to present status of the project.  That said, when speaking about what the solution must do, or engineering requirements, keep in the present tense since the wants, needs and requirements STILL exist currently; they may have been identified before (past), but they still exist now (present) — so use present tense in regard to “what they are.”

To help you place graphics in Google Docs with captions that remain attached, a link to a source having a figure+caption placeholder, a table+caption placeholder, and instructions for their use is available in the Figures and Tables Placement Template (FTT) provided at the same time as and with the PTR-TM template.

_{Google Docs is a trademark of Google LLC.}