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Next, the upper control limit (UCL) and lower control limit (LCL) for the individual values (or upper and lower natural process limits) are calculated by adding or subtracting 2.66 times the average moving range to the process average: = ¯ + ¯.
The importance of knowing the natural process variation becomes clear when we apply statistical process control. In a stable process, the mean is on target; in the example, the target is the filling, set to 1 litre. The variation within the upper and lower control limits (UCL and LCL) is considered the natural variation of the process.
The control limits are set at three standard deviations on either side of the process mean, and are known as the upper control limit (UCL) and lower control limit (LCL) respectively. [2] If the process data plotted on the control chart remains within the control limits over an extended period, then the process is said to be stable. [2] [3]
The Western Electric rules are decision rules in statistical process control for detecting out-of-control or non-random conditions on control charts. [1] Locations of the observations relative to the control chart control limits (typically at ±3 standard deviations) and centerline indicate whether the process in question should be investigated for assignable causes.
Both the units were synchronised to the Rwandan grid on 27 October 2014 and 30 October 2014. The Rwanda government gave the contractor a deadline in October 2014. [8] The power station was completed and handed over by consortium to client on 28 November 2014. It was officially inaugurated by the president of Rwanda on 5 March 2015. [9]
The following page lists all power stations in Rwanda. The country is in the midst of a rapid expansion of its electrical grid and many new plants are proposed or under construction. Rwanda is planning to expand its grid power up to 556 MW in 2024. As of December 2022, the national installed generation capacity totaled 276.068 megawatts.
The water treatment and distribution facility is located in the lakeside community of Karenge, Rwamagana District, in the Eastern Province of Rwanda, on the shores of Lake Mugesera, approximately 50 kilometres (31 mi), by road, southeast of the city of Kigali, the national capital.
The Ruzizi I Hydroelectric Power Plant is on the Rusizi River between Rwanda and the DRC. The city of Bukavu, DRC, is to the north and west of the dam, and the settlement of Burongo, Rwanda, is to the southeast. [1] The dam is 3 kilometres (1.9 mi) downstream from the Lake Kivu overflow at the head of the Rusizi River.