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  2. Process performance index - Wikipedia

    en.wikipedia.org/wiki/Process_performance_index

    Consider a quality characteristic with a target of 100.00 μm and upper and lower specification limits of 106.00 μm and 94.00 μm, respectively. If, after carefully monitoring the process for a while, it appears that the process is out of control and producing output unpredictably (as depicted in the run chart below), one can't meaningfully estimate its mean and standard deviation.

  3. Process capability - Wikipedia

    en.wikipedia.org/wiki/Process_capability

    The ability of a process to meet specifications can be expressed as a single number using a process capability index or it can be assessed using control charts. Either case requires running the process to obtain enough measurable output so that engineering is confident that the process is stable and so that the process mean and variability can ...

  4. Process capability index - Wikipedia

    en.wikipedia.org/wiki/Process_capability_index

    Values near or below zero indicate processes operating off target (^ far from T) or with high variation. Fixing values for minimum "acceptable" process capability targets is a matter of personal opinion, and what consensus exists varies by industry, facility, and the process under consideration.

  5. List of musical symbols - Wikipedia

    en.wikipedia.org/wiki/List_of_musical_symbols

    Musical symbols are marks and symbols in musical notation that indicate various aspects of how a piece of music is to be performed. There are symbols to communicate information about many musical elements, including pitch, duration, dynamics, or articulation of musical notes; tempo, metre, form (e.g., whether sections are repeated), and details about specific playing techniques (e.g., which ...

  6. Peak programme meter - Wikipedia

    en.wikipedia.org/wiki/Peak_programme_meter

    This is a PPM for digital audio. It shows only peak sample values, not true waveform peaks (which may fall between samples and may be higher in amplitude). [1] It may have either a 'true' or a 'quasi' integration characteristic. Over-sampling peak programme meter. This is a sample PPM that first oversamples the signal, typically by a factor of ...

  7. Shewhart individuals control chart - Wikipedia

    en.wikipedia.org/wiki/Shewhart_individuals...

    To this plot is added a line at the average value, x and lines at the UCL and LCL values. On a separate graph, the calculated ranges MR i are plotted. A line is added for the average value, MR and second line is plotted for the range upper control limit (UCL r).

  8. Musical tone - Wikipedia

    en.wikipedia.org/wiki/Musical_tone

    Traditionally in Western music, a musical tone is a steady periodic sound. A musical tone is characterized by its duration, pitch, intensity (or loudness), and timbre (or quality). [1] The notes used in music can be more complex than musical tones, as they may include aperiodic aspects, such as attack transients, vibrato, and envelope modulation.

  9. Register (music) - Wikipedia

    en.wikipedia.org/wiki/Register_(music)

    A register is the range within pitch space of some music or often musical speech. It may describe a given pitch or pitch class (or set of them), [1] a human voice or musical instrument (or group of them), or both, as in a melody or part. It is also often related to timbre and musical form.