[Scene definition] How old screws and new screws should be tested for competitor benchmarking should start from the actual production scene of the plant and not be based solely on the diameter or price of the screws. It is recommended that baseline data, control tests, process capabilities and curricula vitae be first collated and then observed at single, hourly and three scales per 10,000 items. The aim of this step is to establish comparable old programme benchmarks so that subsequent screw changes can be supported by data.

The most easily overlooked of the topic is the coherence between short-term improvements and long-term stability. Plants should bind the planned lifetime to the annual operating hours, the type of feedstock and the frequency of maintenance, and establish a strict ranking of the various feedstocks to determine the boundary according to the highest risk conditions. Vendors can make retroactive trade-offs between interoperability, earmarking and cost when there are clear values for product weight, daily production, customer quality caps and allowed stop times.

The main line of the case [design focus] is to determine whether or not to stereotype and reproduce using reversible data. In geometric and material programmes, the inner and worn state of the cylinders should be integrated into the gap between the alignment, so as to avoid new screws being dragged by old cylinders; and to match the measurability of the measurement segment with the required back pressure, without excessive back pressure. The final solution would also need to be compatible with the wear and tear of the cylinder, the drive, the physical velocity and the current cleaning process, and would not cover up co-operation or process problems with a single high-level material.

The new [comparison-valid] program proposes a minimum of 12 hours of continuous operation, with a 60-module extraction for each stabilization phase, to record the temperature of the entropy, the size of the product, and the single energy consumption. The test shall first establish a stabilization point at a medium rate of rotation and a medium back pressure, then gradually expand the process window, and also retain, for ease of comparison, a matrix, a stable and long-lived sample grouping. If only the first one is checked, it is easy to miss the risks associated with heat drifting, material stoppage, reversal loop return and prolonged wear and tear.

When the [stabilized production] spiral is shaped, trend maps should be created for the pyroclastic exterior, the reverse ring gap and the inner inside of the cylinder, and the abnormal twisting, storage time overtime and material rebounding should be set as an early overhaul signal. The time of storage, back pressure, screw velocity, noise and mass of the product shall be recorded in a uniform manner in the shift. When the above indicators change at the same time, the mechanical gaps and the state of the raw materials should be checked before the process is adjusted to avoid the use of parameters to compensate for hardware degradation.

The [comprehensive cost] cost statement should not be a single screw price, and inventory funds, maintenance and rust-proofing costs should be calculated for the back-up screws, compared with emergency delivery costs, and procurement prices should be annualized on the basis of expected useful life to prevent the frequent replacement of low-price programmes to raise costs. It is recommended that the cost per 10,000 eligible items be exported simultaneously, the cost per 1,000 operating hours and the estimated number of return months. When new programmes reduce waste, refuelling or sudden shutdowns, higher initial inputs are often offset during production.

The [Closed Ring Management] will eventually include drawing numbers, screwdriver materials, heat treatment, critical dimensions, portable tubes, process windows and acceptance data in the curriculum vitae cards. It is proposed to set warning limits for the thermozones of the cylinders and for the drive loads, instead of looking only at averages, and to create trend maps for the pyroclastics, anti-ring gaps and the inner diameter of the cylinders. When there is a significant change in the feedstock formulation, feed ratio, product structure or target node, the applicable boundary of “how the old and the new screws should be tested as a congener” should be reassessed, rather than defaulting that the old conclusion is permanent.

Title of article: A guide to the selection of a plastic factory at the end Data validation and continuous improvement