Written authorisation must be provided by the client for any changes to the original work specification or for any additional work.

客户对原先工作（设计）有 任何修订或是有另外额外的工作时， 必须提供书面确认。

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They work from a specification of the service interface provided by either the Software Architect or another Developer.

他们以软件架构师或另一个开发人员提供的服务接口规范为基础开展工作。

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If you provide a development service where customers order development work, or features by specification, then the process is more visible.

如果您在客户按规范定购开发工作或功能的情况下提供开发服务，则流程就更加可见了。

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Testing and specification work is done, and sea trials are underway now.

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It may mean that work experience, training, equal opportunities and the recruitment of apprentices are stipulated as part of the contract specification.

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