Define TPS & DSS, Provide Some Examples Of These Systems In Business


Describe The Three Quantitative Models Typically Used By Decision Support Systems
- Sensitivity Analysis
- What-If Analysis
- Goal-Seeking Analysis
Sensitivity Analysis is that which measures the impact to a model when changes are made to one or more parts of it. This is usually accomplished by the operator of the system repeatedly changing the values of one or more of the variables and observing the resultant effect on the rest of the model.
Similarly, a What-If Analysis also measures the impact of changes in models. Instead of just determining how sensitive the model is to changes however, this model measures the exact effect. For example, a commonly used application of What-If Analysis is to determine a business’s different break-even points depending on varying amounts of sales and/or expenses.
In comparison to these two models that measure the end results of inputs, the Goal-Seeking Analysis model works backwards from the finished product to determine the inputs necessary to achieve such a goal. It does this by setting a target value or goal for a variable, such as desired sales and then repeatedly making changes to others until the desired outcome is achieved.
For example, in supermarkets the ‘checkout’ process is a clear use of business processes within an organisation. In this instance, the process involves all the steps both the customer and store personnel undertake to complete the transaction. As seen in the diagram below, the checkout ‘process’ begins when the customer gets into line and ends when they receive the receipt for their purchases. Retail stores such as K-Mart which have begun integrating automated self-serve check-out systems to this process, are also examples of how organisations can work to improve these processes.
Compare Business Process Improvement And Business Process Re-Engineering
Business Process Improvement is when the decision makers in an organisation attempt to understand and measure the current business process that is in place and make any necessary improvements. In order to do this there is a cycle of 5 basic steps that are followed. These steps are;
· Documenting the way the system currently works
· Establishing a way to measure the process
· Following the Process
· Measuring the Performance
· Identifying and Implementing Improvements
In this way, Business Improvement is an effective way to implement gradual and incremental improvement to an existing process, for example, many businesses today have adapted their inventory system from pen/paper records to electronic scanning.
Re-engineering on the other hand, refers to when a process is made to be totally redundant and so, is re-engineered to suit and model new technology. Unlike, Improvement, it assumes that the system currently being used is unnecessary or inefficient and as such should be overhauled and recreated from scratch. In this way the basic steps of Business Process Re-Engineering include;
· Setting the Project Scope
· Studying the Competition
· Creating New Processes
· Implementing the Solutions
Describe The Importance Of Business Process Modelling (Or Mapping) And Business Process Models
As the use of technology becomes more and more common in business, the importance of business process modelling and business process models will increase. Unlike in the past, when managers could easily improve their processes purely through observation, in today’s high-tech business environment, they are increasingly becoming invisible.

These models can take the form of either an As-Is Process Model, or To-Be Process Model. Where an As-Is Model represents the process as it is now, the To-Be model illustrates the results of applying possible improvements. In this way, the creation of a Business Process Model can be used in business to both clarify the present situation and express the vision for improvement.