Case Study and Bid-Winning Solution Analysis for the Dongfeng D6 Sludge Tipper Truck (Blue License Plate, 3 m³) Procurement in Baoji City. In urban sewage pipeline maintenance, sludge removal is a high-frequency, essential operational requirement. Blue license plate 3 m³ sludge tipper trucks—operable with a Class C driver’s license, convenient for urban access, and highly maneuverable—have become the top choice for grassroots sanitation units. This article analyzes a real-world municipal sanitation department tender for three such vehicles, deconstructing the evaluation criteria and winning bid proposal to help procurement entities understand how to maximize scores across technical, commercial, and service dimensions. I. Tender Background and Requirements Analysis At the end of 2025, a district-level municipal sanitation department in a western Chinese city (Baoji) issued a procurement notice for three blue license plate 3 m³ sludge tipper trucks, intended for enclosed transportation of pipeline sludge and septic tank residues within the urban area. The budget was capped at approximately RMB 1.323–1.434 million (based on publicly available tender information), with requirements including low vehicle curb weight, excellent sealing performance, high tipping efficiency, and a chassis compliant with China VI emission standards. Following preliminary market research, shortlisted bidders included Chengli Special Purpose Vehicle (using Dongfeng D6 chassis) and Foton Times, among others. Upon delivery, these vehicles will integrate with existing vacuum trucks to form a closed-loop ‘vacuuming + transport’ operation. The procurement manager noted that previously deployed vehicles from other brands had experienced issues such as inadequate sealing and hydraulic lifting system jamming; therefore, higher expectations were set for chassis stability, superstructure manufacturing quality, and after-sales service. II. Breakdown of Tender Evaluation Criteria Per the publicly released tender document (aligned with local procurement conventions), the evaluation criteria were divided into three categories: Technical Score (50 points), Commercial Score (30 points), and Service Score (20 points). The detailed breakdown is as follows: Evaluation Dimension | Points | Key Assessment Items | Chengli’s Score ---|---|---|--- Technical Score | 50 | Chassis specifications, superstructure craftsmanship, compliance with official vehicle announcements, environmental emissions compliance, tipping efficiency | 48 Commercial Score | 30 | Reasonableness of quotation, enterprise qualifications, proven track record, payment terms | 28 Service Score | 20 | After-sales response time, local service network coverage, spare parts availability, training commitments | 19 As shown above, the technical score carries the highest weight and serves as the key differentiator. Chengli’s proposal achieved near-perfect scores across all three dimensions, resulting in a final composite score of 92 out of 100—ranking first overall. III. How to Maximize the Technical Score The technical score primarily assesses whether the vehicle meets all specified tender parameters: gross vehicle weight ≤ 4,495 kg; rated payload ≥ 1,500 kg; body volume = 3 m³; minimum tipping angle ≥ 45°; and inclusion of a hydraulic lifting system. 1. Chassis Selection: Dongfeng D6 China VI Chassis Chengli recommended the Dongfeng D6 series chassis (reference announcement model: CLW5040ZLJ6SL), with a wheelbase of 2,800 mm and powered by a fully domestic 95-horsepower Quanchai engine meeting China VI emission standards. Widely adopted in the sanitation sector, this chassis boasts high market penetration and strong parts interchangeability. Its curb weight is only 2.3 tons—leaving ample payload margin for the 3 m³ body—and achieves a rated payload of 1,750 kg, exceeding the tender requirement by 250 kg—delivering a clear technical advantage. 2. Superstructure Craftsmanship: Hydraulic Lifting System + Dual-St