1. Start with the process and business objective
Begin with what must happen before and after the machine. A request for “an automatic packing machine” is not a specification. State the incoming product condition, required transformation, acceptable finished pack, target operating pattern, downstream handling, and the business constraint the equipment must solve.
Describe whether the purchase is a new line, capacity expansion, replacement, pilot, contract-manufacturing setup, or integration into an existing process. This context changes the appropriate technology, redundancy, automation level, documentation, and commissioning plan.
- Product entering the equipment and its condition
- Required output and acceptance criteria
- Upstream and downstream interfaces
- Operating shifts and planned utilization
- Known bottleneck, quality issue, or labor constraint
- Destination site and target commissioning window
2. Define product and material characteristics
Machine suitability often depends more on the actual product and packaging material than on nominal speed. Provide representative samples or controlled data where possible. For powders, include bulk density, flow behavior, dust, moisture sensitivity, dose range, and cleaning concerns. For liquids and pastes, include viscosity range, foaming, temperature, corrosiveness, particulates, and required accuracy.
For packaging materials, identify structure, thickness, dimensions, tolerances, seal layer, print registration, coefficient of friction, reel parameters, and any migration or product-contact requirements. When final material is not selected, require the supplier to state the tested assumption and the limits of the proposed design.
- Minimum, nominal, and maximum product conditions
- Container, closure, film, foil, carton, label, or cup specifications
- Allowed variation and defect criteria
- Product-contact material expectations
- Cleaning agents and sanitation method
- Sample quantity available for trials
3. Specify output as an operating window
A single maximum speed is commercially attractive but technically weak. Define the target, minimum acceptable, and product-dependent output over the actual format range. State whether the figure refers to mechanical speed, stable production, good units after rejects, or line output after downstream constraints.
Also define the expected run duration, stop frequency, batch size, changeover pattern, and efficiency assumptions. A machine that reaches a headline speed for two minutes may not meet an eight-hour production requirement. Ask the supplier to identify the conditions under which the quoted output is valid.
- Units per minute or hour by product and format
- Acceptable reject and giveaway limits
- Continuous test duration
- Changeover time and tools required
- Operator count at target output
- Expected line efficiency calculation and exclusions
4. Map formats, recipes, and change parts
List every current format and distinguish future possibilities. For each format, provide dimensions, weight or dose, packaging material, closure, artwork registration, and any unique inspection requirement. Mark which format is the design basis and which represents the mechanical extreme.
Require a format matrix from the supplier showing standard adjustment, recipe change, dedicated tooling, optional module, or unsupported combination. This prevents later disputes about “included formats” and exposes the cost and lead time of change parts.
- Format list with revision-controlled drawings
- Recipe storage and access levels
- Manual versus automatic adjustment points
- Change-part list, storage, identification, and price
- Wrong-part prevention or setup verification
- Future-format design reserve, if required
5. Document utilities, environment, and site constraints
Provide the available electrical supply, frequency, compressed-air pressure and quality, water, steam, vacuum, extraction, network, drainage, and environmental conditions. If a utility is not available, do not assume the supplier will include generation equipment.
Share site access, floor loading, ceiling height, door dimensions, lifting restrictions, clean-area classification, ambient temperature and humidity, washdown needs, noise limits, and available maintenance clearance. A technically suitable machine can still fail as a project if it cannot be delivered, installed, cleaned, or serviced in the building.
- Voltage, phase, frequency, and permitted load
- Compressed air, water, steam, vacuum, extraction, and drainage
- Temperature, humidity, dust, corrosion, or clean-area conditions
- Maximum footprint and maintenance envelope
- Access route and lifting plan
- Required cable, pipe, and network connection boundaries
6. Define controls, data, safety, and interfaces
State the required control architecture only where the plant has a justified standard. Otherwise ask the supplier to identify PLC, HMI, drives, safety components, sensors, software licenses, and source-code or backup policy. Confirm language, units, access levels, alarm history, batch data, recipe control, and remote-support conditions.
Describe physical and digital interfaces with upstream and downstream equipment. Define line-start and stop logic, accumulation behavior, reject confirmation, emergency-stop zones, data handshake, coding systems, inspection devices, and responsibility for integration testing. Safety requirements must be reviewed by competent professionals against the destination jurisdiction and actual installation.
- Preferred or prohibited component brands, with acceptable equivalents
- Communication protocols and data points
- User access, audit, recipe, and backup expectations
- Cybersecurity and remote-access controls
- Guarding, interlocks, emergency stops, and risk documentation
- Integration responsibility and interface test method
7. Convert quality expectations into acceptance tests
Avoid phrases such as “high quality” or “European standard” without measurable criteria. Define dimensions, weight tolerance, seal integrity, code readability, label position, reject performance, surface finish, noise, leakage, or other product-specific results. Link each criterion to an inspection method, sample size, evidence, and decision authority.
For machinery, create a preliminary factory acceptance test before placing the order. Specify test material, quantities, run time, speed, formats, planned stops, measurements, video or data evidence, punch-list classification, retest rules, and shipment release. Site acceptance should then focus on installation and site interfaces rather than repeating an undefined factory demonstration.
- Critical-to-quality characteristics and tolerances
- Measurement method and calibrated instruments
- FAT material responsibility and shipment
- Pass, conditional pass, fail, and retest rules
- Punch-list closure and evidence
- Site acceptance prerequisites and utility readiness
8. Specify documentation, training, spares, and service
Create a document deliverables list with language, format, revision, submission milestone, and approval responsibility. Typical items may include general arrangement drawings, foundation loads, utility diagrams, electrical schematics, parts lists, manuals, maintenance schedules, certificates or declarations where applicable, test records, software backups, and packing information.
Define training location and audience, installation supervision, commissioning support, remote support, response expectations, warranty start point, exclusions, recommended spares, consumables, and critical components. Ask how long parts are expected to remain available and which components can be sourced locally.
- Document index and revision-control method
- Required languages and editable/native formats
- Operator, maintenance, and administrator training
- Installation and commissioning responsibility matrix
- Warranty scope and trigger date
- Commissioning, two-year, and critical-spares lists
9. Close the commercial and logistics boundary
A technically complete machine can still generate an incomplete quotation. Require the supplier to state Incoterm, named place, packing method, gross dimensions and weights, transport protection, export documentation, tooling, test material, travel, installation, taxes, duties, and all exclusions.
Define payment milestones against objective deliverables rather than calendar dates alone. Confirm the effect of design changes, approval delays, sample delays, and failed tests. The final specification, deviation list, supplier offer, drawings, FAT protocol, and commercial terms should form one controlled contract package.
- Price breakdown by base equipment, options, tooling, and services
- Delivery term, named place, and shipment readiness definition
- Packing, marking, preservation, and container assumptions
- Payment milestones and required evidence
- Change-order and delay mechanism
- Order of precedence among contract documents
RFQ package: minimum practical checklist
- Process description and line context
- Product and material data sheets plus samples where possible
- Format matrix and revision-controlled drawings
- Target output and defined operating conditions
- Utilities, environment, footprint, access, and interfaces
- Controls, data, safety, inspection, and coding requirements
- Acceptance criteria and provisional FAT protocol
- Document, training, spares, warranty, and service requirements
- Destination, Incoterm boundary, schedule, and commercial assumptions
- Mandatory / preferred / supplier-proposed classification for every major requirement
Conclusion
A strong specification does not need to prescribe every engineering solution. It must define the required outcome, constraints, evidence, and decision rules well enough that competent suppliers can propose alternatives without changing the problem. The best time to resolve ambiguity is before quotation comparison—not during factory acceptance or after the equipment arrives.
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