Upgrade Existing Excel VBA Automation

My workbook already contains a sizable VBA routine that keeps our day-to-day data flowing, yet it now throws occasional errors, runs slower than it should, and is missing a few purpose-built functions that would save even more time. I need the codebase tuned rather than rebuilt: squash the bugs, streamline the logic so it executes faster, and insert several new user-defined functions that handle repetitive steps I still perform manually.

You will receive the current file with full source code and a short list of the extra tasks these new functions must cover. Please keep the structure familiar, add clear comments, and avoid breaking existing naming conventions so future tweaks remain simple.

Deliverables
• Clean, fully tested VBA module(s) with all errors resolved
• Performance-optimized procedures with measurable speed gains
• Newly added custom functions integrated into the workbook
• Concise change log explaining what was fixed, improved, and added

If this sounds straightforward for you, I’m ready to hand over the file and walk through the desired outcomes right away.