[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-655967-105":59,"doc-detail-655967-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","data-flow-diagram-examples-food-ordering-system-tutorial","Data Flow Diagram - Examples - Food Ordering System - Tutorial","","Food Ordering System DFD tutorial explains how to model information exchange using context DFD (Level 0) and a decomposed Level 1 DFD. It details one system process interacting with external entities such as Supplier, Kitchen, Manager, and Customer, plus data flows representing exchanges. It then describes three key processes, supporting inventory/order data stores, and generating reports and bills. The guide adds practical tips and cautions about process labeling, managing complexity, and avoiding misuse between data flow and process flow.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":30,"@type":76,"position":81},"https://docshare.wps.com/document/technology/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/data-flow-diagram-examples-food-ordering-system-tutorial/655967/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/data-flow-diagram-examples-food-ordering-system-tutorial/655967.png","ImageObject",300,407,{"name":92,"@type":93},"River Wang","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-25",true,{"@type":102,"interactionType":103,"userInteractionCount":34},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"What does a Context DFD show in the Food Ordering System example?","Question",{"text":112,"@type":113},"It shows the top-level view with only one visible process representing the complete system, along with external entities and data flows that indicate information exchange.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"How does the Level 1 DFD describe the Food Ordering System processes and data stores?",{"text":117,"@type":113},"It decomposes the system process into multiple processes, including placing an order, handling kitchen work, generating bills, updating order and inventory stores, and producing reports from inventory and orders.",{"name":119,"@type":110,"acceptedAnswer":120},"What is the main caution about modeling connectors in a Data Flow Diagram?",{"text":121,"@type":113},"Connectors represent data exchange, not process flow steps. A connector labeled like a request feeding a data store is a misuse in DFD terms, and process flow should be modeled with UML Activity or BPMN instead.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},655967,1793052200,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":29,"category_name":30,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":34,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":81,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":39},1099514067438,"https://ap-avatar.wpscdn.com/avatar/100002539ee87300030?x-image-process=image/resize,m_fixed,w_180,h_180&k=1780474512215547542","Visual Paradigm  \nData Flow Diagram: Examples-Food Ordering System  \nTutorial  \nData Flow Diagram: Examples-Food Ordering System  \nWritten Date : February 16, 2015  \nThe Food Ordering System Example  \nContext DFD  \nA context diagram is a data flow diagram that only shows the top level, otherwise known as Level 0. At this level, there is only one visible process node that represents the functions of a complete system in regard to how it interacts with external entities. Some of the benefits of a Context Diagram are:  \n1. It shows an overview of the boundaries of a system.  \n2. No technical knowledge is required to understand it, thanks to its simple notation.  \n3. It is simple to draw, amend, and elaborate on due to its limited notation.  \nThe figure below shows a context Data Flow Diagram that has been drawn for a Food Ordering System. It contains a process (shape) that represents the system to be modeled, in this case, the\"Food Ordering System.\" It also shows the participants who will interact with the system, called external entities. In this example, the Supplier, Kitchen, Manager, and Customer are the entities who will interact with the system. In between the process and the external entities, there are data flows (connectors) that indicate the existence of information exchange between the entities and the system.  \nA Context DFD is the entrance to a data flow model. It contains one and only one process and does not show any data stores.  \nLevel 1 DFD  \nThe figure below shows the level 1 DFD, which is the decomposition (i.e. , breakdown) of the Food Ordering System process shown in the context DFD. Read through the diagram, and then we will introduce some of the key concepts based on this diagram.  \n[https://www.visual-paradigm.com/tutorials/data-flow-diagram-example-food-ordering-system.jsp](https://www.visual-paradigm.com/tutorials/data-flow-diagram-example-food-ordering-system.jsp) Page 1 of 3  \nVisual Paradigm  \nData Flow Diagram: Examples-Food Ordering System  \nTutorial  \nThe Food Order System Data Flow Diagram example contains three processes, four external entities, and two data stores.  \nBased on the diagram, we know that a Customer can place an Order. The Order Food process receives the Order, forwards it to the Kitchen, stores it in the Order data store, and stores the updated Inventory details in the Inventory data store. The process also delivers a Bill to the Customer. The Manager can receive Reports through the Generate Reports process, which takes Inventory details and Orders as input from the Inventory and Order data stores, respectively.  \nThe Manager can also initiate the Order Inventory process by providing an Inventory order. The process forwards the Inventory order to the Supplier and stores the updated Inventory details in the Inventory data store.  \nData Flow Diagram Tips and Cautions  \nTips  \n1. Process labels should be verb phrases; data stores are represented by nouns.  \n2. A data store must be associated with at least one process.  \n3. An external entity must be associated with at least one process.  \n4. Don't let it get too complex; normally, 5-7 processes are manageable for the average person.  \n5. DFDs are non-deterministic—the numbering does not necessarily indicate a sequence, but it is useful for identifying processes when discussing with users.  \n6. Data stores should not be connected to an external entity; otherwise, it would mean that you're giving an external entity direct access to your data files.  \n7. Data flows should not exist between two external entities without going through a process.  \n8. A process that has inputs but no outputs is considered a \"black-hole\" process.  \nCautions  \n[https://www.visual-paradigm.com/tutorials/data-flow-diagram-example-food-ordering-system.jsp](https://www.visual-paradigm.com/tutorials/data-flow-diagram-example-food-ordering-system.jsp) Page 2 of 3  \nVisual Paradigm  \nData Flow Diagram: Examples-Food Ordering System  \nTutorial  \nDon't mix up data fl","cbCaikBlpjYUxGsp","https://ap.wps.com/l/cbCaikBlpjYUxGsp","pdf",210611,"English","# Context DFD\n## Entrance to a data flow model\n# Level 1 DFD\n## Decomposition of the system process\n# Data Flow Diagram Tips and Cautions\n## Tips\n## Cautions: data flow vs process flow\n# Resources","[{\"question\":\"What does a Context DFD show in the Food Ordering System example?\",\"answer\":\"It shows the top-level view with only one visible process representing the complete system, along with external entities and data flows that indicate information exchange.\"},{\"question\":\"How does the Level 1 DFD describe the Food Ordering System processes and data stores?\",\"answer\":\"It decomposes the system process into multiple processes, including placing an order, handling kitchen work, generating bills, updating order and inventory stores, and producing reports from inventory and orders.\"},{\"question\":\"What is the main caution about modeling connectors in a Data Flow Diagram?\",\"answer\":\"Connectors represent data exchange, not process flow steps. A connector labeled like a request feeding a data store is a misuse in DFD terms, and process flow should be modeled with UML Activity or BPMN instead.\"}]","Data Flow Diagram - Examples - Food Ordering System - Tutorial | PDF",1792965157]