Skip to content
Erich Grundman

Portfolio

Tools for shipping decisions

Each tool starts from a decision a shipper has to make and models the cost mechanism underneath it, so you can change the inputs and see what moves. I build them with Claude Code on synthetic data, and every dataset states where it came from, because none of it may come from an employer.

Working tools

Pkg 1 of 3Decision tool

Parcel invoice audit agent

An agent reads a carrier invoice against the shipper's own records and the published rules, disputes the lines that do not hold up, and says what it cannot verify.

  • parcel
  • carrier billing
  • agents
Pkg 2 of 3Decision tool

Dim weight break-even

The box size at which dimensional weight overtakes actual weight, and what a packaging change is worth across a whole order book.

  • parcel
  • packaging
  • shipping cost
Pkg 3 of 3Decision tool

Parcel zone optimizer

Place one, two, or three fulfillment nodes, then see what the zone distribution and the blended cost per package do in response.

  • parcel
  • network design
  • shipping cost