The text does not have a specific section devoted to these topics. The following PowerPoint material and links will provide sufficient information to accomplish the stated objectives.

Here is the PowerPoint for Tuesday, May 1: edi&pos.ppt (752k)

After completing your studies, you should be able to:

• Describe how POS systems operate.
• The types of errors that can occur in a POS system.
• The types of controls that can be used to provide reasonable assurance that these errors can be prevented, or detected and corrected.

For discussion on Tuesday, May 1: Read this report. It is a study on scanner accuracy. It is fairly long. You may wish to review it on-line rather than in printed form. Answer these three questions.

1. How accurate must a scanner operation be in order for it to be "certified?"
2. What causes errors in scanning operations?
3. What kinds of controls can be used to prevent and/or detect and correct these errors?

After completing your studies, you should be able to:

• Define EDI and describe several different ways of implementing EDI.
• The benefits of using EDI.
• The problems associated with using EDI.
• Controls appropriate for an EDI operation.

For discussion on Tuesday, May 1.

1. Read An EDI Primer - from GE Information Services.
2. Read the EDI Overview and Introduction to Electronic Data Interchange sections found found on Netscape's home page.

3. New - added 12/2001 - The Weakest Link . Add to class assignments / discussion.

4. Read EDI Controls. I have listed your name next to one of the controls discussed in the check list. Be prepared to explain what type of problem the control is designed to correct and/or detect. Explain why that control is necessary for the safe and effective operation of EDI.
   • Joni A. - General Control #1.
   • Melissa B. - General Control #3.
   • Kristen E. - General Control #4.
   • Dallas E. - General Control #5.
   • Kate G. - General Control #6.
   • Lisa H. - General Control #7.
   • Ashley H. - General Control #8.
   • Jeana H. - General Control #9.
   • Adam K. - General Control #10.
   • Brian K. - Input Control #2.
   • Amanda R. - Input Control #4.
   • Jamie S. - Processing Control #1.
   • Anne S. - Output Control #1.