3.4 Bidding Procedures, Bid Bonds, Addenda, and Bid Ethics

Procurement and Solicitation Methods: ITB vs. RFP vs. RFQ

Project owners initiate competitive procurement using one of three solicitation instruments depending on the delivery system and whether award is driven strictly by price or by best value:

1. Invitation to Bid (ITB) / Advertisement for Bids / Notice to Bidders: Standard for traditional Design-Bid-Build lump-sum and unit-price contracts, and mandatory for most public works construction. The ITB states the project scope, owner identity, instructions for obtaining bid documents, pre-bid meeting date, bid security requirements, and the exact deadline and location for sealed bid opening. Public ITB awards must go to the lowest responsive and responsible bidder:
   • Responsive Bidder: A contractor whose bid strictly conforms to all formal solicitation requirements—submitted before the exact clock deadline, properly signed, accompanied by the required bid security, acknowledging all addenda, and displaying all mandatory license disclosures on the exterior bid envelope.
   • Responsible Bidder: A contractor possessing the active Tennessee license classification, sufficient monetary limit, financial resources, integrity, safety record, equipment, and past experience necessary to perform the contract.
2. Request for Proposals (RFP): Used in private commercial work, Design-Build, and Construction Management at Risk (CMAR). Competing firms are evaluated on a weighted best-value basis that combines technical approach, project schedule, key personnel qualifications, and fee/price.
3. Request for Qualifications (RFQ): Solicits statements of qualifications (experience, financial capacity, EMR safety history, and bonding capacity) without price bids—either to establish a pre-qualified shortlist of contractors invited to bid, or for Qualifications-Based Selection (QBS) of architects and engineers.

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Site Investigation Duty, Pre-Bid Conferences, and Addenda

1. Duty to Inspect the Physical Site

Standard Instructions to Bidders require every bidder to visit the physical jobsite prior to submitting a bid to inspect surface topography, site access, staging constraints, local utility locations, and available geotechnical boring logs. A contractor who skips the pre-bid site visit assumes the risk of any adverse physical condition that a reasonable visual inspection would have disclosed.

2. Pre-Bid Conferences and the Rule Against Oral Clarifications

Owners and architects frequently hold a pre-bid conference (which may be optional or mandatory; failure to sign the attendance sheet at a mandatory pre-bid conference disqualifies a bidder). During the meeting or throughout the bidding period, bidders submit formal questions regarding discrepancies or ambiguities in the plans and specifications.

3. Addenda (Written Pre-Bid Modifications)

An Addendum (plural: Addenda) is a formal written or graphic modification issued by the architect or owner after the bidding documents are released but BEFORE bids are opened. Addenda clarify ambiguous details, correct drawing conflicts, approve product substitutions, or extend the bid opening date. Once issued, addenda become binding Contract Documents.

• Mandatory Acknowledgment: Every bidder must list and acknowledge receipt of each issued addendum (by number and date) in the designated space on the Bid Form. Failing to acknowledge an addendum renders a competitive bid non-responsive and requires rejection on public projects.
• Addenda vs. Change Orders: Addenda are issued before bid opening (or contract execution) to all bidders; Change Orders are issued after the construction contract has been signed.

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Evaluating Subcontractor Quotes and Bid-Day Room Management

Because trade subcontractors often transmit quotes in the final minutes before bid closing, the prime contractor's bid-day room must systematically verify every quote:

• Scope Gaps and Overlaps: Compare competing trade quotes against a master scope checklist to ensure no specification section is omitted (scope gap, such as neither the concrete sub nor the sitework sub including underslab vapor barrier and gravel base) or counted twice (scope overlap).
• Inclusions, Exclusions, and Taxes: Verify whether material quotes include freight/delivery and Tennessee Sales Tax ($7\%$ state base rate plus applicable local option tax, since contractors are the taxable end-users of materials incorporated into real property in Tennessee).
• Tennessee License & Exterior Envelope Compliance (T.C.A. § 62-6-119): Verify that every subcontractor holds an active Tennessee license in the required classification with a monetary limit covering its quote. Under T.C.A. § 62-6-119 and Board Rule 0680-01-.24, the prime contractor must list on the outside of the sealed bid envelope (or electronic bid header) its own name, license number, expiration date, and classification, plus the same four items for any Electrical, Plumbing, HVAC, or Roofing subcontractor whose portion is $25,000 or more ($\ge \text{\textdollar}25,000$) and any Masonry subcontractor whose portion is $100,000 or more ($\ge \text{\textdollar}100,000$).

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Bid Security / Bid Bonds and Withdrawal for Clerical Error

1. Bid Bonds (5% to 10% Penal Sum)

To prevent frivolous bidding, owners require Bid Security—typically a Bid Bond issued by a corporate surety (or a certified/cashier's check)—in an amount equal to $5\%$ to $10\%$ of the total bid price. The Bid Bond guarantees that if the bidder is awarded the contract within the specified bid-holding period (usually $30\text{ to }60\text{ days}$, during which the bid is irrevocable once opened), the bidder will execute the contract at the bid price and furnish the required Performance Bond and Payment Bond.

2. Bid Mistakes: Clerical Error vs. Error in Judgment

If a low bidder discovers a mistake after bids are opened but before contract execution, legal relief depends entirely on the type of mistake:

• Clerical or Mathematical Mistake (Withdrawal Permitted): An objective, demonstrable error in compiling the bid—such as transposing numbers, misplacing a decimal point, failing to carry a page subtotal forward, or a spreadsheet formula skipping a row. If the mistake is material, honest, and reported immediately in writing supported by original estimating worksheets, the bidder is generally permitted to withdraw the bid without forfeiting its bid bond—provided the bidder cannot reform/adjust its bid price or participate in re-bidding.
• Error in Judgment (No Relief — Bound to Bid or Forfeits Bond): A subjective miscalculation—such as underestimating crew man-hours, misjudging soil hardness, or misreading clear contract specifications. An error in judgment generally does not support the same relief as a documented clerical mistake.

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Unethical and Illegal Bidding Practices

Competitive bidding relies on sealed confidentiality and independent pricing. Estimators must distinguish between unethical post-bid price manipulation and criminal antitrust collusion:

• Bid Shopping: Occurs when a prime contractor discloses a subcontractor's quoted price to competing subcontractors (either shortly before bid submission or after being named the apparent low prime bidder) to pressure them into undercutting that figure so the prime contractor can pocket the price reduction. Bid shopping destroys subcontractor trust, incentivizes corner-cutting on quality and change orders, and can violate Tennessee public bid envelope listing laws when a listed trade subcontractor is improperly substituted after bid opening.
• Bid Peddling: The mirror-image practice initiated by a subcontractor—occurs when a subcontractor proactively contacts a prime contractor to discover the current low trade quote and offers to undercut a competitor's submitted price after trade quotes have closed.
• Bid Rigging / Collusion (Federal Felony): Any horizontal agreement among competing contractors to manipulate or restrain competitive bidding. Common forms include complementary (cover) bidding (submitting intentionally high or non-compliant bids so a pre-selected conspirator wins), bid rotation (competitors taking turns being the low bidder across successive contracts), bid suppression (agreeing to refrain from bidding or to withdraw a submitted bid), and geographic or customer market division. Bid rigging is a per se criminal felony under Section 1 of the Sherman Antitrust Act, punishable by up to $100 million in corporate fines, $1 million in individual fines, up to 10 years in federal prison, treble civil damages, and permanent debarment from government contracting.