00
m
m
m
W
RP
==
,
(21)
Within minor operation time intervals elements ageing insignificantly affects the
system reliability. Therefore, failure rates increase slightly. In this case efficiency
possesses its own nature and its alteration is only displayed in so-called social effect
[10].
Reliability of any object in the course of extended operation decreases even if
repairs and maintenance schedule are strictly kept with (Fig.13).
Figure 13. Alterations in technical system’s reliability throughout its lifetime
Having overlaid technical system operational efficiency modeling results upon its
reliability alteration diagram and that of its functional state, the pattern of its functional
temporal borders may be obtained.
CONCLUSION
Lifecycle of a technical system is determined by a substantial quantity of external
operational factors, part of each is of detectable nature, whereas another part is of
random nature. These factors include various environmental conditions, operational
loads, working schedule, proficiency of servicing personnel, general manufacturing
culture, etc. To date, there are multiple concepts for technical system lifecycle
management, including, in particular, such aspects as maintenance and repairs, which
evolved and are now prospective. However, a process of system’s technical condition
assessment in a state of insufficient information remains a critical item and has not got
a single unambiguous solution up till now.
In this view, the presented work proposes an assessment method for a system’s
technical condition in incomplete data environment, which enables to assess system
1
0.98
0.96
0.94
0.92
0.90
0.5
0
t
- 1654 -