From Fig 3 it can be seen that the constituents of the IOCE for the RCM framework make up the other stages in
the product lifecycle. Using the context diagram and the product lifecycle (Fig 3 & Fig 2) as a guide, a SIPOC
(suppliers, inputs, process, outputs and customers) diagram [18] (see Fig 4) can be made for the RCM framework to
clearly understand the specific links of RCM framework for a wind turbine gearbox to other stages of the gearbox
lifecycle. Suppliers and customers define the cross-functional teams and individuals who are stakeholders in
providing the inputs and making use of the outputs respectively, from the RCM framework. For the purpose of this example, the majority of suppliers and customers are internal to the organisation, with the only external stakeholder
being the gearbox manufacturer. The inputs to the process considered here are mainly the data which are required
for RCM. This data varies from design to field data and requires individuals with respective technical competencies
to make use of them for RCM. Also, the suppliers and customers of the RCM process are mostly the same groups of
individuals, however, they make use of different inputs and outputs of the process. For example, the design
engineering team are responsible for providing design information which are needed for RCM, however, they also
have to make use of other data like failure and repair information for design reviews. Hence for an ideal RCM
framework to be implemented, these stakeholders will have to participate in shaping the requirements for the
process directly or indirectly. For example, design & manufacturing data are needed to be correlated with field
operations data in order to identify the functional failures and select critical components. Therefore, the RCM group
working on these aspects should be made up of representatives with the knowhow of the design and manufacturing
details of the gearbox as well as those with field O&M experience.