Maintenance stage

Additional advantages of process analyzers are the possibility to automate all or most parts of the analysis to offer the opportunity of a 24/7 unattended operation. On the downside, the level of complexity and upfront effort during the design, implementation and even maintenance stages can be high and require specialized expertise. 

The focus of the product-maintenance stage is to ensure continued product success in the market. The manufacturing and operations teams ensure that product meets all requirements and continues to be robust. This activity ensures stable shipment of product to customers. In addition, periodic quality assurance audits are conducted to determine continued compliance relative to quality system requirements. This is the stage where all required design and platform activities are validated using large samples and appropriate corrective actions and continuous improvement activities are implemented. 

Control of these factors is relatively simple in the design, installation, or maintenance stages. However, a single weak link can render all or a portion of the grounding system useless. Detection and correction of grounding system deficiencies increases in difficulty as corrosion, vibration, weattier conditions and other factors take their toll. This is especially true in portions of the system that are below grade or inaccessible. 

It should be noted that the FTA cannot solve all the prblems involved in either hardware or software safety. There is a need to develope additional methods for evaluating system safety. It is not intended to replace with FTA proven efficient methods for developing software safety 7, but rather to integrate FTA within them. FTA can be used during the whole life-cycle of the system from the requirement stage to the maintenance stage. 

User s manual must include the mention of all residual risks and all hazards that may occur during operation, including the maintenance stages. 

---