Process reasoning
Differences can hide in contact materials, drives, instrumentation, cleaning systems, solids handling, documentation or commissioning support. A quotation may state a capacity without the feed conditions that support it. Build a clarification table with offered, excluded, optional and unresolved items. Avoid giving an option credit for a feature that is only described in a generic brochure. Total cost also depends on achievable production and lifecycle requirements.
ILLUSTRATIVE EXAMPLE
Apply the reasoning
In an illustrative comparison, one offer includes the centrifuge only, while another includes a feed pump, polymer skid and cake conveyor. Comparing total prices directly misrepresents the equipment value. First define a common boundary and obtain prices for the missing interfaces. Then compare the performance basis and acceptance evidence; equal hardware lists do not guarantee equal process results.
What to record
| Item | Basis to document |
|---|---|
| Process basis | Feed range, solids load, product quality and operating schedule |
| Mechanical scope | Materials, discharge, access and wear provisions |
| Package scope | Pumps, chemicals, handling, utilities and controls |
| Evidence | Datasheets, trial report, acceptance plan and documentation |
Review checklist
- Separate guaranteed figures from indicative catalogue data.
- Record exclusions in the comparison table.
- Use the same units and moisture basis.
- Resolve every material assumption before award.
Your next decision
Issue a common clarification sheet to the shortlisted suppliers and preserve their responses. Use weighted criteria reflecting the actual project: process fit, evidence, scope completeness, maintainability and cost. Keep payment, delivery and contractual review with the responsible commercial team. A clear technical comparison reduces rework and gives the selected supplier an unambiguous design basis.