| Process and application understanding | Whether the supplier asks about material properties, batch size, viscosity, solids content, temperature, mixing purpose, and required production rate. | A written process review that links the proposed mixer type, impeller or mixing element, vessel geometry, and operating conditions to the application. | A recommendation based only on a requested motor power or vessel volume, without discussing the material or mixing objective. |
| Mixing performance validation | How the supplier will evaluate blend uniformity, dispersion, dissolution, emulsification, or other specified process outcomes. | Agreed acceptance criteria and a documented test plan, such as a representative trial or a defined sampling and testing method. | Guaranteed performance claims without defined test conditions, measurement methods, or acceptance criteria. |
| Engineering and customization capability | Whether drawings, equipment interfaces, operating conditions, and required options are reviewed before production. | Application-specific drawings, a clearly defined scope of supply, and documented approval of key specifications before manufacture. | Unclear responsibility for controls, installation interfaces, utilities, or customer-specified options. |
| Materials and fabrication quality | Material grade, wetted-part requirements, surface finish where relevant, weld quality, and component traceability. | Material declarations or inspection records appropriate to the project, plus agreed fabrication and inspection documentation. | Material descriptions that are vague, inconsistent, or unsupported by records when traceability is required. |
| Quality management | Whether the manufacturer uses documented procedures for design review, purchasing, production, inspection, and corrective action. | A current quality-management certificate that can be checked with its issuer, together with records relevant to the equipment being supplied. | Use of a certificate logo or claim that cannot be independently verified, or a certificate whose scope does not fit the work. |
| Safety and regulatory requirements | Applicable requirements based on the destination market and operating environment, including electrical safety and any hazardous-area or hygienic-design needs. | A written compliance plan identifying applicable requirements and the documents, assessments, or declarations supplied for the specific machine. | Broad claims of universal compliance without identifying the applicable market, machine configuration, or supporting documentation. |
| Testing and inspection | What is inspected before shipment, including mechanical operation, controls, safety functions, and any agreed process-related checks. | An agreed inspection and test plan, recorded results, and a factory acceptance test where appropriate to the project. | Testing is promised verbally but has no defined scope, records, or opportunity for review. |
| After-sales service and spare parts | Availability of manuals, troubleshooting support, spare-parts identification, and service arrangements for the destination country. | A parts list, operating and maintenance documentation, clear support contacts, and stated service and warranty terms. | Unclear response arrangements, missing documentation, or no practical way to identify replacement parts. |
| Delivery and project communication | Whether milestones, customer approvals, packaging, shipping responsibilities, and required delivery documents are defined. | A written schedule and responsibility matrix, with named project contacts and agreed document deliverables. | Delivery promises that omit approval steps, shipping scope, or responsibilities for customs and installation. |
| References and business verification | Whether the supplier can provide relevant project references and verifiable business and manufacturing information. | References for comparable applications, subject to customer consent, and business details checked through appropriate official or independent channels. | References that cannot be verified or inconsistencies between the contracting party, payment details, and manufacturing information. |