A façade contractor runs a factory and a site, and the truth gets lost between them. Muthari OS is one system where the package’s work actually happens — the submittal register the consultant answers to, purchase orders and goods receipts that write the stock, fabrication stages with QC standing at the end, delivery notes with a QR on every zone, daily installation records, inspections, and claims built from what was actually done.
Drawings and material submittals with revisions, comments and response ages. Production cannot start on an unapproved drawing — the system refuses, and a superseded revision stops the floor.
Receive 300 of an ordered 500 and the PO shows the balance. Every receipt lands as a batch with a QC decision — approve, quarantine and split, or return to the supplier with the paper trail. Only approved stock can be issued.
Zones move through fabrication behind drawing-and-material gates. QC before dispatch. A QR code on every zone that ships; a scan on site opens its whole history. Installation is recorded daily against zone quantities the system will not let you exceed.
Progress claims derive previous quantities from the last invoice — double-claiming is structurally impossible. Variations are caught when zones exceed the BOQ, before you install them for free. Omissions and remeasures revise the claimable quantity on the record.
A façade package is managed against elevations and levels, and almost every control problem is really a sequencing problem between the consultant, the factory and a slab that is not ready.
Shop drawings and the material submittals that travel with them — aluminium system and finish, glass make-up, gaskets, hardware, sealant, anchors — each with its own approval clock. Comments come back per submittal and get revised; a performance mock-up is often approved separately and ahead of the main package. What matters operationally is that a revision is not just filed: production must be held until the drawing for that zone is approved and released, and a superseded revision must be able to stop the floor.
Aluminium profiles, processed glass, hardware sets and consumables arrive from different suppliers on different lead times, usually in partial deliveries. Each receipt is checked against the ordered quantity, raises stock, and goes to quality before it can be issued — glass in particular is inspected for edge damage at receipt, because a pane found broken after installation is a re-order with a long lead behind it.
Cutting and machining, assembly, glazing, gasket and hardware fitting, then a quality decision before anything is packed. Unitised work is assembled and glazed in the factory and moves as complete units; stick systems ship as profiles and are glazed at height, which moves the risk from the workshop to the scaffold and changes what the record has to hold.
Units are packed by zone and loaded in installation sequence, not in production sequence — a truck loaded in the wrong order costs a day of crane time. A delivery note per trip, a code on each zone that opens its history when scanned, and a site receipt against what actually arrived.
Setting out and anchor fixing, then installation recorded daily per zone against that zone's quantity. Inspection requests follow the work — material inspection before use, work inspection after completion — and anything rejected becomes a non-conformance record with a cause and a closure rather than a note in a chat. Snagging at height is expensive, so the value of a photographic record stamped with name and time is that it settles what was done and when without a second visit.
The bill of quantities is broken into the same zones the factory and the site work to, so a claim is assembled from installed quantities that are already recorded. Zones that exceed their contract quantity surface as variations before they are installed for free, and previous quantities come from the last invoice rather than being retyped.
The same fabricate-and-install spine runs joinery and woodwork packages — zones become rooms, the workshop’s stages replace the fabrication line, and the handover record is per room.
The same operational chain runs every specialist trade — a factory and a site against one contract. Why specialist contractors need a different model, and what construction operations software is. For the broader category, see construction project management software.