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Describes a maintenance or supporting activity where we are not sure of its classification
p is an adjust activity = Def p is a process and there exists a material artifact m that has a function f and participates in p at some time. The following is also true: - m has state at some time some sub-optimal operating state s1 and optimal operating state s2 - f is impacted by s1 - p occurs at some time tp - tp finishes s1 and p starts s2
Bringing any out of tolerance condition into tolerance.
A BFO:Process involving a change of state in an item that improves the ability of an item to perform its function or fulfil its capabilities without requiring restoration of the function/capability
p is a calibrate activity = Def p is a process and there exists a material artifact m that has a function f and participates in p at some time. The following is also true: - m is the bearer of a control and monitoring role ry - m has state at some time some failed state or degraded state or operating state s and operating state s2 - if s is failed state or degraded state then s disables f - if s is sub-optimal operating state then s impacts f - p occurs at some time tp: tp finishes s and tp starts s2 - p is is prescribed by some part of a preventative maintenance strategy ps
A task involving testing and adjustment of instrumentation to assess and restore function
A BFO:Process performed on equipment instrumentation, to estimate the ability of the instrumentation and restore if needed.
p is an diagnose activity = Def p is a process and there exists a material artifact m that has a function (or capability) f and participates in p at some time. The following is also true: - m has state at some time some degraded state or failed state state s - f is disabled by s - s is observed in some observation process
The cause of failure, or degradation, is investigated but no maintenance action performed, or action is deferred.
A BFO:Process, performed on observation of an equipment failure or degradation, to estimate the ability of an item to perform its required function.
p is an inspect activity = Def p is a process and there exists a material artifact m that has a function f and participates in p at some time. The following is also true: - m has state at some time some state s - s is observed in some observation process o - p is prescribed by some part of a preventative maintenance strategy ps
Periodic, careful scrutiny of an item carried out with or without dismantling.
A BFO:Process, aligned with a preventative maintenance strategy, to estimate the ability of an item to perform its required function.
p is a repair activity = Def p is a process and there exists a material artifact m that has a function f and participates in p at some time. The following is also true: - m has state at some time some failed state or degraded state s and operating state s2 - p occurs at some time tp - s disables f, tp finishes s and tp starts s2
Manual maintenance action performed to restore an item to its original appearance or state.
A BFO:Process that improves the ability of an item to perform its required function, including restoration of the function
p is a replace activity = Def. p is a process and there exists material artifacts a and b such that a and b participate in p at some time. The following is also true: - a has a function f and b has a function f2. - f and f2 are of type F - a is a continuant part of a system s at time t and b is not - b is a continuant part of a system s at time t2 and a is not - p occurs at some time tp - t precedes t2, p finishes t and p starts t2.
Replacement of an item by a new or refurbished item of the same type and make
A BFO: Process in which one item is removed and another item with the same required function is installed in its place.
p is a service activity = Def p is a process and there exists a material artifact m that has a function f and participates in p at some time. The following is also true: - m has state at some time some operating state s and operating state s2 - p occurs at some time tp: tp finishes s and tp starts s2 - p is is prescribed by some part of a preventative maintenance strategy ps
Periodic service task: not normally dismantling of the item.
A BFO:Process, aligned with a preventative maintenance strategy, involving a change of state in an item that involves no change in the ability of the item