Engineering and Maintenance Flashcards
Impact of maintenance
-Plant availability
-Production costs
-Quality of product
-Safety
-Environmental impact
Maintenance triggers
-Breakdown
-Time
-Event
-Usage
-Condition
No maintenance approach
No specific maintenance plan in place. Maintenance takes place when triggered.
Run to failure/Breakdown approach
A plan and resources occur if a breakdown occurs, but equipment is only attended to if and when it breaks down. Must have back ups ready or lots of SOH.
Preventative approach
Plant maintained according to plan to prevent equipment failure and breakdown. Maintenance scheduled based on elapsed time, amount of product produced, or the number of operating hours. Reduce unforeseen downtime and maintenance costs.
Predictive approach
Scheduled maintenance based on data from equipment monitoring the plant and process to predict when failures will occur and prevent them. Warning limits set for equipment (eg overheating pump). Keeps equipment in service for as long as possible between repairs. Fewest disruptions in production.
CMMS, Computerized Maintenance Management Systems
Sophisticated versions of maintenance systems that organize and record plant maintenance.
TPM, Total Productive Maintenance
“total” refers to both maintenance professionals and operating staff. Goals: zero breakdowns, zero defects, reduce emergency/unscheduled maintenance, eliminate failures and waste due to equipment operations, zero accidents.
OEE, Overall Equipment Effectiveness
Availability x Performance x Quality
RCM, Reliably Centered Maintenance
Approach that uses a team of maintenance personnel and operators to determine how things fail and what the consequences are. Combines PM, PdM, and proactive maintenance.
