Value sales, which appear to be the selection of conventional equipment, are prone to deviations due to the fact that material grade, thermal processing, processing accuracy, life and services are not assessed simultaneously. For retrofit dealers, the right approach would be to establish a situational baseline before discussing specific configurations.

The value of technology sales is to reduce the risk that customers will miss the equipment and accessories. Sales personnel need to close the demand questionnaire, technical evaluation, quotation boundaries, delivery nodes and post-sale recording, so that customers know what data each recommendation is based on, and that internal design and manufacturing teams have consistent information. 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.

It is recommended that customer information be broken down into five groups: products and moulds, raw materials, platforms, process objectives and existing problems. Product end logs of single weight, flowway, number of caves, wall thickness and appearance levels; ratio of feedstock end recorder number, melting finger, filling, flame retardation and retrofitting; terminal logs of tonnage, voltage, screw diameter, maximum travel, injection pressure and plasticization. All data are sourced and are marked, drawn, physical, measured or estimated by clients. The focus of the discussion here is material grade, thermal processing, process accuracy, lifetime and services, which must correspond to the customer ' s current production conditions and not be limited to the maximum values in machine samples.

The whole-life cost comparison programme could be used as the main line for project advancement, with an evaluation of sales, design, process and customer participation. The evaluation focused on the completeness of the input data, whether the assumptions were confirmed by the client, whether the mechanical interfaces were matched, how standards and specialized programmes were selected, and who provided the acceptance data.

If the above steps are ignored, the most common consequence is that low unit prices may be converted into stoppages, end-of-life and frequent replacements. The problems are often manifested in the trial phase of measuring time instability, insufficient stress residuals, buffer drift, unmelted, black spots, colour differentials or increased wear and tear. Continued increase in temperature, back pressure and turn speed at this time may temporarily improve the appearance, but may increase the shearing heat, material degradation and equipment load.

The focus of the validation was on the cost of tons, the loss of shut-down and the lifetime. The test shall use the actual material and representative moulds of the client, retaining the batch number, dry condition, ambient temperature and sample number. When compared to old schemes, equipment, moulds and major process conditions other than screws should be as consistent as possible. Thus, value sales should not follow the simple logic of “symmetrically-sized screws”. Only by accounting for products, feedstocks, tonnages, voltage, screw diameter and target cycles will the standard screws have a clear scope of application and the dedicated screws have a reasonable design basis and return on investment.