mywbut.com Data Flow Diagrams (DFDs) 1 mywbut.com Specific Instructional Objectives At the end of this lesson the student will be able to: • • • Identify the activities carried out during the structured analysis phase. Explain what a DFD is. Explain why constructing DFDs are important in arriving at a good software design. • Explain what a data dictionary is. • Explain the importance of data dictionary. • Identify whether a DFD is balanced. Structured Analysis Structured analysis
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National Cranberry Cooperative 1. The wait time for trucks to back onto a Kiwanne dumper and empty their contents was up to three hours. Even though $75‚000 was spent on a fifth Kiwanne dumper‚ this did not seem to help overtime costs. This assumes that it is the delay in trucks emptying their contents that caused the overtime to be required. A potential cause is the lack of dryers and the lack of berry appropriate holding bins‚ i.e. not enough wet or dry berry holding bins – these causes
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Figure 1.0: Entity Relationship Diagram of Generic Academic Performance Monitoring System Figure 2.0: Context Diagram of Generic Academic Performance Monitoring System The figure 2.0 represents the two (2) users of the Generic Academic Performance Monitoring System namely the Administrator and the Professor. The Administrator entity shows the capability to access the system; manage account by modifying account’s profile; managing member’s account such as creating new user profile and updating
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The cost benefit of adding the additional drying unit and advancing the shift start time are higher than the cost benefit of other options considered. THE COMPANY The Receiving Plant I (RPI) of National Cranberry Cooperative (NCC) processes both wet and dry cranberries in a highly mechanized process involving 400 workers during peak season. The processed berries are sold in bulk and bags. PROBLEM STATEMENT NCC is currently wrestling with both
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National Cranberry Cooperative (NCC) Case Analysis NCC Issues at Receiving Plant No.1 (RP1): Hugo Schaeffer‚ vice president of operations at NCC has currently identified three problems at the core of RP1. These three problems are: - Idle time: under the current process trucks are spending too much time waiting to unload cranberries at RP1 - Resource Utilization: the current allocation of full time and part time workers has resulted in increased costs as a result of both over time and absenteeism
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Here’s the problem‚ gang… We now that the bottleneck in the process is the Drying unit. Using the diagram‚ we can assess: 1. TPT is 19‚000*.7 wet barrels/12 work hrs in work day = 1108 wet bbls per day 2. The dryer unit can process 600 bbls wet cranberries per day Looking at the process we know that there is a bottleneck at Drying unit: I. The capacity of the drying unit is 600 bbl /hr which is much lower than the required 1108 wet bbl/day we need. II. On an average day a total
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The major trends of the cranberry industry and the problems facing RP#1 There are several major trends that we can observe in the cranberry industry for the period of 1945-1979 (See Table 1 in the Appendix). First‚ there is a steady production increase in each of the five-year periods: from 615‚000 barrels in 1945-1949 to 1‚546‚120 barrels 30 years later. The production growth was caused by the increasing mechanisation of cranberry industry. For example‚ water harvesting could result in a yield
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5 Design Decision Styles. What’s Yours? By Jared M. Spool Originally published: Jan 21‚ 2009 In the early days of e-commerce‚ we studied how seasoned hiking customers bought hiking boots online. Two sites in our study‚ L.L. Bean and REI‚ both sold virtually identical boots at the same price with practically the same marketing copy. Yet the customers we studied were far more likely to buy the boots on the REI site than on the L.L. Bean site. Why? Because the product pictures on the REI site showed
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Free Data Flow Diagrams Tutorial DFD Tutorial Data Flow Diagrams - Introduction Data flow diagrams can be used to provide a clear representation of any business function. The technique starts with an overall picture of the business and continues by analyzing each of the functional areas of interest. This analysis can be carried out to precisely the level of detail required. The technique exploits a method called top-down expansion to conduct the analysis in a targeted way. [pic] The
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4.3 DATA FLOW DIAGRAM A data flow diagram is a graphical technique that depicts information flow and transforms that are applied as data move from input to output. The DFD is also known as Data Flow Graph or Bubble Chart. The DFD is used to represent increasing information flow and functional details. Also DFD can be stated as the starting point of the design phase that functionally decomposes the requirements specifications down to the lowest level of detail. A Level 0 also called a fundamental
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