Listen for gurgling sounds in nearby drains if the toilet continues to flush slowly. These sounds, if you hear them, mean that there isn't enough air in the waste lines to allow water to flow freely. Go on the roof and clear debris from the vent opening. Once the opening is clear, spray water into it with a garden hose.
The Kimball Lifecycle. The Kimball Lifecycle is a methodology for developing data warehouses, and has been developed over many years by Ralph Kimball and a variety of colleagues.
The processes that form the integral part of the defect prevention methodology are on the white background. The vital process of the defect prevention methodology is to analyze defects to get their root causes, to determine a quick solution and preventive action. These preventive measures, after consent and commitments from team members, are embedded into the organization as a baseline for future projects.