{"id":218913,"date":"2025-05-24T16:35:20","date_gmt":"2025-05-24T16:35:20","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=218913"},"modified":"2025-05-24T16:35:22","modified_gmt":"2025-05-24T16:35:22","slug":"%c2%a2a-book-company-receives-orders-by-mail-from-customers","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/05\/24\/%c2%a2a-book-company-receives-orders-by-mail-from-customers\/","title":{"rendered":"\u00a2A book company receives orders by mail from customers"},"content":{"rendered":"\n<p>\u00a2A book company receives orders by mail from customers. The details of the book are checked for completeness (and supplemented if necessary) and the retail price determined. If the orders are prepaid the payment details are recorded and the order is forwarded for filling. If it is an account customer then the customer details are checked and discount determined. The accounts receivable are checked for excess amount owed. If credit is OK then order is filled, else prepayment is requested. To fill an order the inventory is checked and stock adjusted. If the book is available the shipping note is made and sent to the customer with the book(s) and the account customer invoiced. If the book is not available the order is placed on back order. Draw context diagram and level 0 DFD<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">1. Context Diagram<\/h3>\n\n\n\n<p><strong>Entities:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Customer<\/strong> (sends order, receives books and invoices)<\/li>\n\n\n\n<li><strong>Book Company System<\/strong><\/li>\n<\/ul>\n\n\n\n<p><strong>Process:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The system receives orders and payments from customers<\/li>\n\n\n\n<li>The system sends books, shipping notes, and invoices to customers<\/li>\n<\/ul>\n\n\n\n<p><strong>Data Flows:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Order from Customer \u2192 Book Company System<\/li>\n\n\n\n<li>Payment from Customer \u2192 Book Company System (if prepaid)<\/li>\n\n\n\n<li>Books, Shipping Note, Invoice \u2192 Customer<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">2. Level 0 DFD<\/h3>\n\n\n\n<p><strong>Processes:<\/strong><\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Check Order Details<\/strong><br>Inputs: Order<br>Outputs: Completed Order, Retail Price<br>Checks completeness and determines retail price.<\/li>\n\n\n\n<li><strong>Check Payment \/ Credit<\/strong><br>Inputs: Completed Order, Payment or Customer Details<br>Outputs: Payment Confirmation or Credit Approval or Request Prepayment<br>If prepaid, payment details recorded; if account customer, credit checked and discount determined.<\/li>\n\n\n\n<li><strong>Fill Order<\/strong><br>Inputs: Approved Order<br>Outputs: Shipping Note, Adjusted Inventory, Invoice or Back Order Notice<br>Checks inventory; if available, prepares shipment and invoice; else places order on back order.<\/li>\n<\/ol>\n\n\n\n<p><strong>Data Stores:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Inventory<\/li>\n\n\n\n<li>Accounts Receivable<\/li>\n\n\n\n<li>Customer Details<\/li>\n<\/ul>\n\n\n\n<p><strong>External Entity:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Customer<\/li>\n<\/ul>\n\n\n\n<p><strong>Data Flows:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Order \u2192 Check Order Details<\/li>\n\n\n\n<li>Completed Order \u2192 Check Payment \/ Credit<\/li>\n\n\n\n<li>Payment Details \u2192 Check Payment \/ Credit<\/li>\n\n\n\n<li>Credit Status \u2192 Fill Order<\/li>\n\n\n\n<li>Inventory Status \u2192 Fill Order<\/li>\n\n\n\n<li>Shipping Note, Books, Invoice \u2192 Customer<\/li>\n\n\n\n<li>Back Order Notice \u2192 Customer<\/li>\n\n\n\n<li>Updates Inventory<\/li>\n\n\n\n<li>Updates Accounts Receivable<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">Diagram Sketch (Text-based)<\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>Context Diagram:\n&#91;Customer] --&gt; Order, Payment --&gt; &#91;Book Company System] --&gt; Books, Shipping Note, Invoice --&gt; &#91;Customer]\n\nLevel 0 DFD:\n\n(Customer)\n   |\n   V\n&#91;1. Check Order Details] --&gt; Completed Order, Retail Price --&gt;\n&#91;2. Check Payment \/ Credit] --&gt; Credit Status or Payment Confirmation --&gt;\n&#91;3. Fill Order] --&gt; Shipping Note, Books, Invoice or Back Order Notice --&gt; (Customer)\n\nData Stores:\n- Inventory (queried and updated by Process 3)\n- Accounts Receivable (checked and updated by Process 2 &amp; 3)\n- Customer Details (used in Process 2)\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"> Explanation<\/h2>\n\n\n\n<p>The <strong>context diagram<\/strong> presents a high-level overview showing the Book Company System\u2019s interaction with its main external entity, the Customer. Customers send orders and payments, and in return receive books, shipping notes, and invoices.<\/p>\n\n\n\n<p>At the <strong>Level 0 DFD<\/strong>, the system is decomposed into three main processes that reflect the core business activities.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The first process, <strong>Check Order Details<\/strong>, ensures each customer order is complete and accurate. It supplements missing information and calculates the retail price for the requested books. This step is crucial to maintain data quality before any financial or logistical processing.<\/li>\n\n\n\n<li>The second process, <strong>Check Payment \/ Credit<\/strong>, handles payment verification. For prepaid orders, payment details are recorded immediately. For account customers, the system validates customer information, determines applicable discounts, and checks the customer\u2019s accounts receivable to ensure they do not exceed their credit limit. If the credit check fails, the system requests prepayment before continuing.<\/li>\n\n\n\n<li>The third process, <strong>Fill Order<\/strong>, manages inventory and shipping. The system checks if the requested books are in stock. If available, it prepares a shipping note, adjusts inventory quantities, and generates an invoice for account customers. If the books are out of stock, the order is placed on back order, signaling a delay to the customer.<\/li>\n<\/ul>\n\n\n\n<p>Supporting these processes are three data stores: <strong>Inventory<\/strong> holds stock information and is updated with shipments; <strong>Accounts Receivable<\/strong> tracks customer balances and payment history; <strong>Customer Details<\/strong> store customer profiles and credit status.<\/p>\n\n\n\n<p>This structured data flow ensures orders are validated, payments verified, inventory accurately tracked, and customers appropriately billed, streamlining the company\u2019s order fulfillment and credit management processes.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/05\/image-384.png\" alt=\"\" class=\"wp-image-218914\"\/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n","protected":false},"excerpt":{"rendered":"<p>\u00a2A book company receives orders by mail from customers. The details of the book are checked for completeness (and supplemented if necessary) and the retail price determined. If the orders are prepaid the payment details are recorded and the order is forwarded for filling. If it is an account customer then the customer details are [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-218913","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/218913","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=218913"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/218913\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=218913"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=218913"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=218913"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}