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Input Controls

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Assignment 3: Input Controls CIS 210 – Systems Analysis and Development Ibrahim Elhag Marc Espos November 12, 2013

In the realm of input security and control, input controls allow users to perform various commands to ensure that the date is correct, complete, and cohesive. When data is entered from an application or automated process, the computer can produce an input log file that identifies and documents the data entered. As a system analyst must determine the importance of automatized and manual controls over data being transpired. Another important aspect a system analyst must determine is to promote data accuracy and quality. Overall the main purpose of this system is to serve as a checkpoint towards ensuring that the data is entered into the system correctly.
One thing to consider is that there are numerous types of input controls. Also that most input controls are designed to be visual and interactive. Some of these input controls are: text boxes, drop-down list box, input masks, and validation rules.
The first input control is text boxes. The standard textbox displays messages or provides a place for a user to enter data. These messages usually include entities of zip codes, addresses, cities, numbers, names, and serial codes. Once a form is submitted, a script can change the structure of a textbox. When designing a text box, the designer should implement the function called auto complete function. The purpose of this control is to simplify the depiction of information when the number of choices is too vast.
The second example of input controls is the drop-down list box. Generally a drop- drop-down list box displays the current selection; when the user clicks the arrow, a list of the available choices displays (Shelly & Rosenblatt, p. 348). A great example of a drop-down list is filling out a survey Specifically when the survey asks the individual of their current residency. The survey first begins at the countries, since there is 195 countries in the world the user will see the same exact number of options.
The third example of input controls deals with input masks. Input masks are templates or patterns that restrict data entry ad prevent errors (Shelly & Rosenblatt, p. 365). Some typical examples of input masks are: date, telephone numbers, zip codes, and Social Security numbers. It is important to remember that you can create custom input masks for any data type. This keeps the data entry process intact and decreases the probability of data being incorrect. A good example of a direct input mask is (000) AAA-AAAA. This purpose of this mask allows the user to substitute the four digits of a phone number with letters. The important thing to remember is that the “0” is a placeholder in the area, thus making it mandatory. Overall this is one of the more using controls because of the validation is has over productivity.
The fourth example of input controls is validation rules. The purpose of this function is to reduce the number of input errors. One way to reduce input errors is to eliminate unnecessary data entry. A good example of that is an outdated item price cannot be used if the items price us retrieved from a master file instead of being entered manually (Shelly & Rosenblatt, p. 366). To fully prevent this error the best measure to take is considering one of the eight validation rules or conditions. An example of this is a sequence check. This is used when data needs to be in a predetermined sequence. If a user enters transactions chronologically, then tractions with an out of sequence date indicate an error (Shelly & Rosenblatt, p. 367). Another example of these conditions is batch controls. Batch controls are used to verify batch inputs. This basically infers that these controls record counts and numeric field totals. So when a batch order is entered, the system then calculates the same two totals. Unlike the other rules of conditions batch controls do not highlight a specific error. Therefore if there is an error when it comes to the quantities of a product, the user will realize something was entered incorrectly not input.
If any of the four listed input controls should fail somehow then the entire design becomes obsolete. For example if text box and drop-down list boxes should fail then inputting data becomes a difficult task. Other problems that should occur are the increased number of data entry and input errors. Designing a user interface without any of these controls sets up the user for failure. Without the proper sequence of certain entities the system will not be able inform designated users for errors.
Restricting user interface has some general advantages. The first advantage promotes the user to prevent spelling errors and avoiding unnecessary data ploys. For example, when making a spelling error the input screen will inform the user of the mistake. Then displays a drop-down-box of acceptations items that the user will find useful towards that given situation. Another advantage is notifying the user informing that they are currently doing something wrong. Then a precursor will open and help the user resolve the error. As for the disadvantages of restricting user interface there is only one glaring issue. This particular issues deals with the users being able to bypass security measures. Further devious intentions will damage and corrupt data, lunch further confusion, and finally disrupt the structure of the given design.

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