15Whoever receives material with a hidden defect has 30 days, counted from actual delivery, to return it or ask for a price reduction, if the goods are movable (Brazilian Civil Code, art. 445).
Cement, steel, pipe and window frames arrive on site by truck: they are movable goods. The clock starts when someone checks the load and records the receipt. In an engineering company with several works under way, whoever makes sure that record exists on all of them, and that the purchase was born right, holds the seat of supply management. C&S Engenharia organizes it as a function of the company, not of one site.
This text describes how C&S Engenharia understands the seat and how it relates to those who build. The reading is C&S Engenharia's, and is marked as such. The norms consulted do not create the position; they define periods, duties and risks that it manages, and all of them are in the references at the end.
Buying site by site looks faster. Each engineer solves his own problem, with the supplier he knows, on the day he needs it. The cost of that speed shows up added together: different prices for the same item, invoices without checks, stock left over at one address and missing at another, and nobody with the whole picture.
At C&S Engenharia, supply management is a central seat. It answers for the full purchasing and supply cycle of all the works together: demand, quotation, contracting suppliers, receiving, inventory, payment and reconciliation, always in compliance. The site says what it needs; the seat turns that need into a traceable purchase.
The seat is not defined by an address. The work is done through the information that arrives from the sites and the controls that check it: request, invoice, receipt, consumption, document. That is why it depends on those who are close to the material, and that is why it has dotted lines.
The cycle is simple to state and easy to break. Each stage answers a question; if the answer is not recorded, the next stage works on assumption.
| Stage | Question it answers | Who checks |
|---|---|---|
| Demand | What does the site need, how much and by when? | Resident engineer, with the in-house crew |
| Quotation | Who supplies the same specification, and for how much? | Supply management |
| Contracting | Under what terms, deadlines and guarantees? | Supply management, with approval by authority level |
| Receiving | Did what was ordered arrive, in the agreed quantity and quality? | Storekeeper and site administrative assistants |
| Inventory | How much is there, where is it and to which work front did it go? | Storekeeper |
| Payment and reconciliation | Do order, delivery and invoice match? Were the withholdings made? | Supply management and finance |
Note the last column. No single person checks everything. That distribution is the design, not an accident of the organization chart.
On an organization chart, the solid line shows the hierarchy: who directs whom. The dotted line shows functional coordination: who works together, follows the same standard and exchanges information, without one being the other's boss. Each person's reporting line remains the one in the company's structure.
At C&S Engenharia, supply management has four dotted lines: the site administrator, the storekeeper (almoxarife), the site administrative assistants and the in-house crew. The seat defines what is recorded, in what format and by when, in whatever concerns purchasing and inventory. Each person's routine and discipline stay with whoever already directs them.
Why not place everything under supply management? Because the site needs a single owner, the person in charge of the site (the resident engineer or, where applicable, the CEO in person), and because whoever receives the material should not report to whoever bought it. The dotted line gives standard, control and traceability without stiffening the site or creating two bosses.
Site administrator. Reports the compliance of suppliers and subcontractors (documents, certificates, expiry dates) and each one's delivery history across the various works. Does so in the monthly routine and whenever a document expires. The full role is described in the text on the site administrator.
Storekeeper. Reports checked receipts, the balance, issues by work front, damage and returns. Receipts go in on the day of delivery; the balance, at the close of the week. This is the end that handles the material, and it will have a text of its own.
Site administrative assistants. Make the paperwork arrive complete: invoice, signed delivery stub, internal request, signature. They report on the same day the document appears, because an invoice stuck in a drawer becomes a late payment or one made without checks.
In-house crew. Reports actual consumption, losses and the needs of the next work fronts, in the weekly schedule. It is the crew that turns the design into real quantities.
| Situation | Site-by-site buying | Central seat with dotted lines |
|---|---|---|
| Same item requested by three sites in the same week | Three quotations, three prices | One quotation, one price, three deliveries |
| Supplier delivers outside the specification | Problem solved on the affected site | A record that applies to every site at the next purchase |
| Surplus material on one site | Stays idle until the end of the works | Recorded transfer to another site |
| Invoice without a delivery check | Paid so as not to be late | Held until the storekeeper records the receipt |
The Civil Code allows the buyer to reject goods received with a hidden defect that makes them unfit for use or reduces their value (art. 441). The 30-day period runs from actual delivery; when the defect can only be noticed later, it counts from discovery, capped at 180 days for movable goods (art. 445, § 1). And if the buyer delays receiving what was placed at its disposal at the agreed time and place, the risk of the goods becomes its own (art. 492, § 2).
For the electronic invoice, Ajuste SINIEF 07/05, the national agreement that created the electronic invoice (NF-e), requires the recipient to verify the validity and authenticity of the invoice (tenth clause, § 1). It also provides for the recipient to state whether the operation took place exactly as reported, did not take place, or was not requested by it (clause fifteen-A, § 1).
The public procurement law does not apply to private works, but it offers a useful model: provisional receipt, done summarily, followed by final receipt, with a detailed report, and the possibility of rejecting the delivery in whole or in part (Lei 14.133/2021, art. 140, II and § 1). At C&S Engenharia, the physical check belongs to the site; the release of payment, to the central seat.
In contracts for buildings and other considerable constructions, whoever supplies materials and execution answers for five years for the soundness and safety of the work, "both by reason of the materials and of the soil" (Civil Code, art. 618). Material bought today remains the builder's concern for years.
Lei 9.933/1999 requires goods subject to technical regulation to conform (art. 1) and extends the duty to whoever uses and stores them (art. 5). For construction materials, SiMaC, part of PBQP-H, the federal quality and productivity program for housing, qualifies manufacturers against Brazilian technical standards and publishes both qualified companies and non-conforming ones.
According to the program, average conformity was below 40% at the start; today it exceeds 80%, with sectors above 95%. The gap between those numbers is what a prior check avoids.
The registration of an individual supplier follows the LGPD, the Brazilian data protection law. The data is personal (art. 5, I), processing rests on the performance of the contract (art. 7, V) and collection stays at the minimum necessary (art. 6, III). Address, ID and bank account for payment, yes; the rest, no.
When material runs out for a work front, the cost of the crew keeps running. Excess material ties up money and takes space the site needs in order to work. NR-18, the occupational safety standard for construction, puts a physical limit on excess: material must be stored without causing accidents, without hindering circulation and without blocking emergency exits or access to firefighting equipment (item 18.16.4).
Toxic, corrosive, flammable or explosive products require an isolated, signposted place with restricted access and the safety data sheet available (item 18.16.5). The storekeeper says whether it fits; supply management decides how much to buy.
Lei 14.133/2021, again as a yardstick, asks purchase planning to consider expected consumption and storage conditions that prevent the material from deteriorating (art. 40, caput and IV). In practice, this comes down to a simple calculation, done item by item: the safety stock.
Lei 14.133/2021 accepts estimating price through direct research with at least three suppliers, with quotes no older than six months (art. 23, § 1, IV); for works, the first reference is the median of Sinapi, the national cost system for civil construction (art. 23, § 2, I). Three proposals are only worth something if they describe the same item. Standardizing the specification for every site comes before quoting.
The same law adopts segregation of duties and forbids one person from acting at the same time in the functions most exposed to risk, to reduce concealed errors and fraud (arts. 5 and 7, § 1). That is the logic of the dotted lines: the site requests, the seat buys, the storekeeper receives and finance pays, each one checking the other's record.
When the contract involves the supply of labor, including labor-only subcontracting, the contracting party withholds 11% of the gross amount of the invoice and pays that sum on behalf of the provider by the 20th of the following month (Lei 8.212/1991, art. 31, caput and § 4, III, the Brazilian social security funding law). The amount withheld must be shown on the invoice (§ 1).
In civil construction, the owner of the works, the developer and the builder are jointly liable with the subcontractor for social security obligations, without the benefit of order, with the right of recourse and of withholding (art. 30, VI). And the CLT, the Brazilian labor code, allows the subcontractor's employee to claim against the main contractor, who keeps the right of recourse and of withholding amounts (art. 455).
Reconciliation, therefore, is more than checking a number. It brings together order, measurement, invoice, withholding and the provider's compliance before releasing the bill.
When C&S Engenharia builds for a development placed under the segregated estate regime (patrimônio de afetação), each project's account is separated by law. The segregated estate does not communicate with the developer's estate or with others, and only answers for the debts of the respective development (Lei 4.591/1964, art. 31-A, § 1). The developer keeps a separate account and complete accounting records for each one (art. 31-D, V and VIII).
For supply, the consequence is practical. A joint purchase for two sites of different developments needs separate invoice, payment and booking. And the contract must state who supplies the material, because the Civil Code does not presume that obligation (art. 610, § 1). IncorpBuilding, which works in real estate development, handles that split on the developer's side; on the builder's side, C&S Engenharia's supply management makes sure each order is born with the right project.
The general coordinator receives the supply picture of every site and decides priorities when two sites compete for the same material. The resident engineer sends the scheduled demand and receives the material on the agreed date; he does not need to negotiate with suppliers to keep the site moving.
The board receives different cuts. The CFO, payment commitments and withholdings to be paid over. The COO, delivery times, stock-outs and supplier performance compared across sites. The CEO, the risk: dependence on few suppliers, purchases outside the standard, contracts without a material rule.
The example is hypothetical. The assumptions are the author's, chosen to make the arithmetic easy, and do not describe a real site or market price. A site uses, on average, 120 bags of cement a day. Between order and delivery, 5 days go by. The supplier sometimes runs up to 3 days late.
| Item (example assumption) | Value |
|---|---|
| Average daily consumption | 120 bags |
| Normal replenishment time | 5 days |
| Possible supplier delay | 3 days |
| Safety stock (120 × 3) | 360 bags |
| Reorder point (120 × 5 + 360) | 960 bags |
| Price per bag (assumption) | R$ 38 |
| Money tied up in safety stock (360 × R$ 38) | R$ 13,680 |
| Cost of a stopped work front per day (assumption) | R$ 9,000 |
| Cost of three days stopped | R$ 27,000 |
The reading is direct. When the balance falls to 960 bags, the order goes out. The 360 safety bags cost R$ 13,680 sitting idle; three days with the front stopped would cost twice that. The calculation changes from site to site, which is why it needs someone to redo it with the actual consumption the in-house crew reports and the space the storekeeper confirms.
The role does not depend on an address. It works through the information that arrives from the sites and the controls that validate it. What needs to be close to the material is the check: receipts, balance and consumption, reported by the ends of the dotted line, by the deadline the seat sets.
No. The reporting line follows the company's structure. The dotted line means functional coordination: supply sets the standard for recording receipts, balances and issues, and the storekeeper follows it, without changing whom he reports to.
No. The person in charge of the site (the resident engineer or, where applicable, the CEO in person) remains the owner of execution and scheduling. That person gains time, because they stop quoting, negotiating with and chasing suppliers, and receive the material on the planned date. What changes is that purchasing follows a standard common to every site.
Record it on the day, with a description and a photo, and inform supply management. For movable goods, the Civil Code gives 30 days from delivery to reject or ask for a reduction; if the defect only appears later, the period counts from discovery, up to 180 days (art. 445).
Because Lei 8.212/1991 requires a party that contracts services involving the supply of labor, including labor-only subcontracting, to withhold 11% of the gross invoice amount and pay it over by the 20th of the following month (art. 31). Reconciliation checks that the withholding was shown on the invoice.
By Raphael Schifino, CVO
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