2. The system must be user-friendly. If operating personnel are to use the system, it must have limited options, be easy to use, provide adequate error correction opportunities, and contain many on-line help features. It should ideally be possible to tailor or customize the system for each application, although this installation activity may have to be carried out by engineering/technical personnel.
3. The system should provide display of control charts for at least the last 25 samples. Ideally, the length of record displayed should be controlled by the user. Printed output should be immediately available on either a line printer or a plotter.
4. File storage should be sufficient to accommodate a reasonable amount of process history. Editing and updating files should be straightforward. Provisions to transfer data to other storage media or to transfer the data to a master manufacturing database
is critical.
5. The system should be able to handle multiple files simultaneously. Only rarely does a process have only one quality characteristic that needs to be examined.
6. The user should be able to calculate control limits from any subset of the data on the file. The user should have the capability to input center lines and control limits directly.
7. The system should be able to accept a variety of inputs, including manual data entry, input from an electronic instrument, or input from another computer or instrument controller. It is important to have the capability for real-time process monitoring, or to be able to transfer data from a real-time data acquisition system.
8. The system should support other statistical applications, including as a minimum histograms and computation of process capability indices.
9. Service and support from the software supplier after purchase is always an important factor in deciding which software package to use.
2. The system must be user-friendly. If operating personnel are to use the system, it must have limited options, be easy to use, provide adequate error correction opportunities, and contain many on-line help features. It should ideally be possible to tailor or customize the system for each application, although this installation activity may have to be carried out by engineering/technical personnel.3. The system should provide display of control charts for at least the last 25 samples. Ideally, the length of record displayed should be controlled by the user. Printed output should be immediately available on either a line printer or a plotter.4. File storage should be sufficient to accommodate a reasonable amount of process history. Editing and updating files should be straightforward. Provisions to transfer data to other storage media or to transfer the data to a master manufacturing databaseis critical.5. The system should be able to handle multiple files simultaneously. Only rarely does a process have only one quality characteristic that needs to be examined.6. The user should be able to calculate control limits from any subset of the data on the file. The user should have the capability to input center lines and control limits directly.7. The system should be able to accept a variety of inputs, including manual data entry, input from an electronic instrument, or input from another computer or instrument controller. It is important to have the capability for real-time process monitoring, or to be able to transfer data from a real-time data acquisition system.8. The system should support other statistical applications, including as a minimum histograms and computation of process capability indices.
9. Service and support from the software supplier after purchase is always an important factor in deciding which software package to use.
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