In the design evaluation, the screw supplier and the equipment manufacturer were first to address not the choice of an off-the-shelf model, but the identification of demand data, assumptions, boundaries, interfaces and acceptance indicators. This step determines whether the subsequent spiral diameter, structure and material grade are well founded.

The effectiveness of the programme needs to be verified with the same materials, moulds and test methods. In addition to size and material reports, time measurement, buffer position, pressure curve, temperature, product weight, appearance and periodicity should also be recorded, with clear acceptance windows. Data-based delivery reduces disputes and facilitates subsequent replication. Material analysis cannot remain under PPP, ABS or PA names. The specific plate number, the percentage of the product or mineral filling, the flame-retarding system, the water-bearing requirements, the permitted stay time and the recommended processing temperature should be checked. Differences in the sensitivity of viscosity, wear, corrosiveness and shearing may be apparent in the broad categories of the same material, which change the compression ratio, the three-part ratio, alloy and surface treatment.

Technical communication distinguishes between three types of objectives that must be met, desired improvement and acceptable. It is necessary to meet the hard boundary of the item for the determination of equipment and screws, and it is hoped that the improvement item will be used for the comparison of standards and specialized programmes, while the acceptable item will help to control costs and deadlines. This would avoid stacking all requirements on a screw and would make it easier for clients to understand the real value of each configuration. The focus of the discussion here is on demand data, assumptions, boundaries, interfaces and acceptance indicators, which must correspond to the customer ' s current production conditions and cannot be based solely on the maximum values in machine samples.

From a sales management perspective, sales, design, process and customer co-confirmation should lead to a standard process that can be used again. Each project saves original needs, computations, final drawings, test modelling data and client feedback, and can call on experience in the event of a similar machine or material, but there is still a need to reconcile key differences and not to copy the historical configuration directly.

Special vigilance is needed to process the fuzzy demand as a risk without evaluation. Many of the post-sale disputes arise from inconsistencies between the design input and the actual production conditions, such as the customer ' s replacement of the raw material number, the increase in the return rate or the transfer of the screw to another set of moulds, while still requiring the maintenance of the original acceptance results. The configuration of the boundary and change management should therefore be included in the technical document.

Upon completion of the project, the closure rate and subsequent changes were assessed as the result of the delivery and the size tests, material or heat treatment certificates, trial modelling records and maintenance recommendations were archived. Sales teams can return after three months or a ton agreement to compare plasticization time, energy consumption, product fluctuations and wear and tear trends. The continuous accumulation of project data for design evaluation will allow the equipment manufacturer to gradually establish a package, industry charter and machine-type menu to allow sales to quickly identify general and special conditions and to submit a truly complex project to application engineers for evaluation in a timely manner.