Distribution and 3PL operations hit a wall with ERPNext's native stock model faster than most teams expect. ERPNext tracks stock down to the Warehouse DocType — which is a tree of locations, not a coordinate system of bins. There is no native concept of a pickable bin address, no directed putaway logic, no wave or zone release, and no automatic FEFO/FIFO enforcement at the moment a Pick List or Stock Entry is created. Once you are running multiple aisles, mixed batch/serial inventory, and pickers who need to be told exactly where to go, the native warehouse tree turns into a spreadsheet-and-tribal-knowledge problem, and stock accuracy erodes shift by shift.

ECOSIRE builds Advanced WMS as a proper Frappe app (ecosire_wms) installed on your own bench, not a bolt-on script. It introduces a Storage Bin DocType keyed to zone / aisle / rack / level / position, linked back to the standard ERPNext Warehouse so all native stock ledger, valuation, and accounting behavior is preserved. Directed putaway runs through a configurable strategy engine (by item volume, velocity/ABC class, zone affinity, batch, or nearest-empty) that resolves the target bin at receipt time via hooks.py document events on Purchase Receipt and Stock Entry. Picking is orchestrated through a Wave and Pick Task model that releases work by zone, batches multi-order picks, and sequences pickers along an optimized path. FEFO/FIFO is enforced in server-side validation — a picker cannot confirm a pick against a newer batch when an older one is available for the same item, and the rule set is driven by data, not hard-coded.

Everything is built to ERPNext conventions so it survives upgrades and stays auditable. Business logic lives in whitelisted server-side methods and doc_events hooks rather than fragile client patches; scanner and desk interactions use Client Scripts and a lightweight Frappe page; nightly cycle-count generation and replenishment suggestions run on Frappe scheduler_events. All bin, wave, and task operations are exposed over the standard Frappe REST API and whitelisted RPC methods so your handheld scanners, mobile app, or conveyor/automation layer integrate cleanly. Access is governed by ERPNext Role Profiles and permission rules — putaway operator, picker, supervisor, and inventory controller each see only what they should.

Because this is a build-to-order product, we do not ship you a generic download and wish you luck. After an initial scoping call we confirm your bin taxonomy, putaway and picking strategies, and batch/serial rules, then build your version, validate it on a staging bench through UAT, and deploy to production with a rollback plan. Typical delivery is one working week from confirmed scope, and you receive the full source, the git repository, documentation, and a post-go-live support window. It targets Frappe/ERPNext v15 and v16.