结论：先做覆盖论证，能测的型号数量可能大幅减少

企业有多个型号需要检测时，第一反应往往是「每个型号都送检」。但在做排期之前，应当先做一件事：覆盖论证。

通过分析型号之间的差异，选择代表性型号做完整测试，论证其余型号被覆盖 ——这能显著减少实际需要测试的型号数量，从而缩短周期、降低成本。

做完覆盖论证之后，再对实际需要测试的型号做排期，考虑并行与串行、样机准备、以及项目之间的依赖。

排期前的准备

型号清单与差异分析。 各型号的差异在哪里。

覆盖论证。 哪些型号可以被覆盖。

项目清单。 每个需要测试的型号要测哪些项目。

周期估计。 各项目的大致周期。

样机情况。 各型号能提供多少样机、什么时候能到。

优先级。 哪些型号急需、哪些可以后做。

「优先级」是排期的重要输入。 如果某个型号要赶市场窗口，应当优先安排，其余型号跟进。

项目周期的差异

项目 相对周期
尺寸与外观 短
功能与性能 短到中
电气安全 中
电磁兼容 中
环境试验 中到长
疲劳耐久 长
材料与化学 中到长

「疲劳耐久」通常是周期的决定项，所以排期时应当优先启动这类项目，让它与其他项目并行。

并行与串行的权衡

完全串行。 一个型号做完再做下一个。样机需求少但周期长。

完全并行。 所有型号同时进行。周期短但样机和资源需求大。

部分并行。 周期长的项目提前并行启动，其余串行。

按项目并行。 同一型号的不同项目并行（如果资源允许）。

按型号分组。 相似型号一组，组内串行，组间并行。

多数情况下「部分并行」是合理选择 ——把疲劳耐久这类长周期项目对所有需测型号同时启动，其余项目按型号串行推进。

样机的协调

总需求量。 各型号各项目的样机需求。

到货时间。 样机能否按排期到位。

样机的复用。 同一样机在不同项目间的流转。

破坏性项目的安排。 放在最后以充分利用样机。

备用样机。 应对意外损坏。

「样机到货时间」常常是排期的实际制约。 排期做得再好，样机不到位也推进不了，建议把样机的准备纳入排期计划。

资源的协调

设备的占用。 某些设备一次只能做一个试验。

长周期项目的设备占用。 疲劳试验可能占用设备很长时间。

人员的安排。

环境舱的容量。 环境试验的批次能力。

与其他委托的协调。 实验室同时有多个委托。

建议在委托时了解实验室的排期能力，特别是长周期项目的设备是否有空档，这直接影响能否按计划推进。

分批送检的策略

如果样机或时间不允许一次全送，可以分批：

按优先级分批。 急需的先送。

按项目分批。 长周期项目先送。

按型号分批。 代表性型号先送，其余跟进。

分批的一致性。 各批样机应当来自同一批次，否则数据可比性受影响。

分批的记录。 各批的样机和项目要记录清楚。

「代表性型号先送」是合理的策略 ——先得到代表型号的数据，如果有问题可以在其他型号送检前先整改。

常见的排期问题

未做覆盖论证。 测了不必要的型号。

长周期项目启动太晚。 成为瓶颈。

样机准备跟不上。 排期落空。

未考虑复测的时间。 出现不合格时没有余量。

未考虑设备排期。 假设实验室随时可以开始。

「未考虑复测时间」是常见的规划失误。 按一次通过来排期，一旦出现不合格，整个计划就被打乱。建议在排期中留出复测的余量。

排期表的组织

建议做一份简单的排期表：

型号行。 每个需测型号一行。

项目列。 各测试项目。

时间轴。 各项目的计划起止。

样机标注。 各项目用哪台样机。

依赖标注。 哪些项目要等前面的完成。

里程碑。 关键的时间节点。

这张表做出来，资源冲突和时间瓶颈就直观可见。

与申报节奏的配合

检测排期还要与申报的节奏配合：各市场的申报时间要求；报告的时效要求；申报资料的准备周期；以及可能的补充要求。

建议倒推排期 ——从申报的时间节点倒推，确定各项测试必须何时完成。

覆盖论证对排期的影响

覆盖论证做得好，排期的压力会明显减轻：

测试型号数量减少。 直接减少工作量。

样机需求减少。 降低准备的压力。

周期缩短。 需测的型号少了，周期自然短。

成本降低。 检测费用与型号数量相关。

后续扩展方便。 新增型号落在覆盖范围内时不必重测。

「后续扩展方便」是长期收益 ——一次做好覆盖论证，后续新增的相似型号可以直接引用。

常见的排期失误

未做覆盖论证；长周期项目启动太晚；样机不到位；未留复测余量；以及未确认实验室的设备档期。

这五项建议在排期时逐项确认。

补充说明

以上内容是通用的思路，具体到每个产品还要按实际情况调整。影响判断的因素包括：产品的具体结构与材料；目标市场的具体要求；使用场景的特点；以及企业自身的质量目标。

建议把这些因素在项目启动时就理清楚，而不是边做边调整——后者往往意味着重复工作。

我们的做法

承接多型号委托时，我们会先看型号差异清单，与委托方讨论覆盖论证的可行性 ——如果能覆盖，实际需要测试的型号会少很多。

排期上，我们会把长周期项目（疲劳、环境）优先安排，并说明各项目的大致周期和设备的可用情况，便于委托方规划。

对于有优先级差异的型号，我们可以按优先级分批安排，让急需的型号先出报告。

如果你有多个型号需要送检，想先理清覆盖论证和排期，可以把型号清单和差异说明发过来一起讨论，或者直接联系：132 4819 8029。检测能力见服务介绍，产品分类见手动轮椅检测与电动轮椅检测，标准信息见标准查询。

English version

Conclusion. When a manufacturer has several models to test, the instinct is to submit every one. Before scheduling, however, one thing should come first: a coverage justification. Analysing the differences between models, selecting representatives for complete testing and arguing that the rest are covered can substantially reduce the number of models actually needing testing, shortening the schedule and lowering cost. Only then should the models genuinely requiring testing be scheduled, considering parallel and serial working, sample preparation and dependencies between items.

Preparation before scheduling. A model list with difference analysis establishes where they differ. A coverage justification establishes which models are covered. An item list establishes what each model needing testing requires. Duration estimates establish roughly how long each item takes. Sample availability establishes how many of each model can be supplied and when. And priorities establish which models are urgent and which can follow. Priorities are an important input: a model chasing a market window should go first with the others following.

Differences in item duration. Dimensions and appearance are short. Function and performance are short to moderate. Electrical safety is moderate. Electromagnetic compatibility is moderate. Environmental testing is moderate to long. Fatigue durability is long. And material and chemical testing is moderate to long. Fatigue durability usually governs the schedule, so it should start first and run in parallel with everything else.

Parallel against serial. Fully serial completes one model before the next, needing few samples and taking a long time. Fully parallel runs every model together, taking less time and needing many samples and much capacity. Partial parallel starts long-duration items in parallel and runs the rest serially. Item-level parallel runs different items on one model concurrently where capacity allows. And grouping runs similar models together, serially within groups and in parallel between them. Partial parallel suits most situations: start fatigue durability on every model requiring testing simultaneously and run the rest serially by model.

Coordinating samples. Total requirement covers samples needed across models and items. Delivery timing covers whether samples arrive on schedule. Sample reuse covers how one sample moves between items. Destructive items should come last to maximise sample use. And spare samples cover accidental damage. Sample delivery timing is often the real constraint: however good the schedule, work cannot proceed without samples, and sample preparation should be part of the plan.

Coordinating capacity. Equipment occupancy matters, since some equipment runs one test at a time. Long-duration items occupy equipment for extended periods, particularly fatigue testing. Personnel must be scheduled. Environmental chamber capacity limits batch sizes. And other clients' work must be coordinated, since a laboratory runs several commissions simultaneously. Establish the laboratory's capacity when commissioning, particularly whether equipment for long-duration items is available, since that determines whether the plan can proceed.

Phased submission. Where samples or time do not permit submitting everything at once, phase it. Phase by priority, sending urgent models first. Phase by item, sending long-duration items first. Phase by model, sending representatives first with others following. Maintain consistency across phases, with samples from the same batch, or comparability suffers. And record each phase clearly, covering samples and items. Sending representative models first is sensible: obtaining their data first allows remediation before the other models are submitted, if problems appear.

Common scheduling problems. No coverage justification, testing unnecessary models. Long-duration items started too late, becoming the bottleneck. Sample preparation falling behind, defeating the schedule. No allowance for retesting, leaving no margin when something fails. And no account of laboratory capacity, assuming work can start at any time. Omitting retest time is a common planning failure: scheduling on the assumption of passing first time leaves the whole plan disrupted by a single failure. Build retest margin into the schedule.

How we handle it. For multi-model work we review the difference list first and discuss the feasibility of a coverage justification with the client, since coverage can substantially reduce the models needing testing. On scheduling we place long-duration items such as fatigue and environmental testing first and state approximate durations and equipment availability, so that the client can plan. Where models differ in priority we can phase the work so that urgent models produce reports first.

Send us the model list and difference description and we will work through coverage and scheduling. Phone or WeChat: +86 132 4819 8029.