Appendix G: Definition Of Reliability As Used In This Specification - Epson TM-U925 Manual

APPENDIX G: DEFINITION OF RELIABILITY AS USED IN THIS
SPECIFICATION
1. MCBF used in this specification means the Reliability Guarantee Period used internally by SEIKO
EPSON CORPORATION. We estimate the average number of lines printed by a customer, and
define the period determined by exponential distribution to be the Reliability Guarantee Period.
The cumulative failure rate within this period is 30%.
2. Although a failure due to wearing out may occur within the Reliability Guarantee Period (depending on
the product), SEIKO EPSON CORPORATION aims to design and manufacture products so that no
failures occur within the Reliability Guarantee Period.
3. Product life in this specification means the average life.
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