About Analytica


This section introduces Analytica and its uses, explains what is included in this tutorial, and tells you how to use this manual.

Welcome to Analytica

If you've used a spreadsheet for building a financial or other kind of quantitative model, you should find Analytica is a revelation. You start a model by drawing an Influence diagram to depict the structure of a problem. You add nodes to depict each variable, setting their role (or class) as a Decision, Chance, Objective, or other type of variable by selecting the relevant shape. You draw arrows (influences) between them to depict relationships, which may be causal, accounting, or probabilistic. This visual approach empowers you to describe the essential qualitative nature of the problem without getting lost in the details. As you develop your understanding of the problem and the structure of the model, you add numbers and formulas (expressions) to quantify the details.

A key feature of Analytica is its ability to create hierarchies of models. By grouping related components of a problem into separate submodels, you can impose a multi-level organization to your model. This helps you to manage complex relationships and allows other users to more easily grasp important concepts.

Tutorial fig1.png

Another key feature of Analytica is the use of Intelligent Arrays™. These enable you to add or remove dimensions such as time periods, geographic regions, alternative decisions, etc., with minimal changes to the model structure. Unlike spreadsheets, which require you to repeat formulas with each new dimension, Analytica separates the dimensions from the relationships so that models remain simple. As the dimensions change, Analytica automatically updates, reports, and graphs the results. Each node, or object, in an Analytica model has a window that displays the node’s inputs and outputs, and allows you to enter definitions, descriptions, units of measure, and other documentary information. This self-documenting capability, combined with hierarchical models and Intelligent Arrays, makes it easier to understand and communicate how models work.

Analytica features fully integrated risk and sensitivity analysis for analyzing models with uncertain inputs; powerful facilities for time-dependent, dynamic simulations; powerful graphing capabilities; and over 200 financial, statistical, and scientific functions for calculating just about any type of mathematical expression.

Who can use Analytica

Analytica is for the modeler and problem solver — from the financial analyst modeling business opportunities to the engineer designing new products to the scientist investigating the behavior of physical phenomena.

It is particularly suited to users in the fields where you have to reason with uncertainties, or arrays of data, or both, i.e., management consulting, health and environmental sciences, aerospace, oil and gas, construction, manufacturing, financial services, and investing.

Tutorial overview

This tutorial is the fastest way to learn Analytica. It takes you through the key steps to explore and analyze an existing Analytica model and to create a new model. If you have a decent-sized screen, it's convenient to arrange the Analytica application on one side, and a browser window showing this Tutorial on the other side.

If you're new to Analytica, start with Chapters 1 to 5. It might take you two to three hours. To work more quickly, just focus on the boxes containing numbered steps with their screen shots. You can read the rest of the text only if needed. You can find any any new terms or concepts in the Glossary or use the search box on the top right of these pages.

This tutorial provides a solid grounding in Analytica’s basic features.

  • Tutorial: Open a model to browse Learn how to open and run an example model to compare the costs of renting versus buying a home, you will calculate results.
  • Tutorial: Reviewing a model Explore the structure and assumptions of a model by examining its influence diagrams, variables, and definitions.
  • Tutorial: Analyzing a model Perform sensitivity and importance analysis to see what assumptions and uncertainties matter and why.
  • Tutorial: Create a model Learn how to build a new model to analyze the costs of owning and operating a car. You create variables, draw influence diagrams, create modules, add documentary text, and analyze results.
  • Tutorial: Arrays Learn about Analytica's Intelligent arrays. Create indexes and tables, and see how the standard expressions generalize for multiple dimensions.
  • Tutorial: Decision trees Use decision trees, and decide where to have your next party. Use probability tables and conditional deterministic tables. This is helpful if you want to model discrete distributions or conditional uncertainties.
  • Tutorial: Dynamic system model Build a dynamic model that varies over time, with feedback loops. It uses an ecosystem model of how foxes and hares affect each others populations.
  • Tutorial: Sharing a model with ACP Upload a model to the Analytica Cloud Platform (ACP) so that other people can easily review and use it via a web browser without having to install Analytica on their computer.
  • ' Example Models and Libraries Explore the rich variety of existing models to get ideas about how to build models for your own projects.

For more details, look at the Analytica User Guide and the rest of this Analytica wiki.

Installing Analytica

If you haven't already installed Analytica on your computer, here's how to do so. You can download the Analytica Free 101 at no cost, if you haven't purchased a higher edition.

  1. Visit http://www.lumina.com/products/free101/.
  2. Click "Download Analytica Free 101".
  3. Save the installer file onto your computer.
  4. Click the downloaded installer AnaSetup4.6.exe to start the installation.
  5. A file download dialog box appears. Click Run to download the installation program. Then run it to install Analytica. Or you can click Save to download the installation program to run later.
  6. If you clicked Run, the Windows Installer should automatically start up and begin installing Analytica.
  7. Follow the instructions in the Installer:
    1. Confirm that you accept the terms of the End-User License Agreement (EULA).
    2. Express vs. Custom install: This option appears when upgrading, when the installer already has all information it needs to proceed. Select Express to complete the installation. Select Custom to review or change license information, install location, or other installation options.
    3. Option to automatically uninstall earlier releases of Analytica for you when upgrading.
    4. License information. Options:
      • Previously activated individual license: Select this if you are re-installing Analytica and already have a valid Analytica license file located in the previous install directory.
      • New individual license: (most common selection) Select this when you have an activation key, either from an Analytica purchase or for Analytica Free 101. If you are a sys admin installing Analytica for a user account other than the one you are running the installer from, you should select this option but leave the activation key field blank -- the activation key must be entered from the account that Analytica will be used from. When the activation key is left blank, you (or the end user) will have another opportunity to enter it when first launching Analytica.
      • Centrally managed license (RLM License Server): Select this if your organization provides floating licenses or named-user licenses, hosted from an RLM License Server. In this case, your organization’s sys admin manages the licenses, and you don’t need an activation key.
    5. End-User Identification. The fields without asterisks are optional. Your name and email is used to configure an account for you on the Analytica Wiki, which provides a tremendous asset when learn and using Analytica, and thus is highly recommended. If you already have an Analytica Wiki account, you can enter your login and password here so that Analytica can automatically log you in when a hyperlink within Analytica links to the Wiki, conveniently avoiding the login page.
    6. Install location. The default installation location for Analytica is C:\Program Files\Lumina\Analytica 4.6. However, if your account is not an administrator account, you may not have the access permission rights to write to that directory, in which case you should change the Destination Folder to C:\Users\«userName»\AppData\Lumina\Analytica 4.6.

If you’ve installed any edition of Analytica, and then later obtain a license for a different edition, you do not need to re-run the installer. You can enter the new license or activation key by selecting Update License... on the Analytica Help menu.

Conventions used in this tutorial

The conventions used in this tutorial are as follows:

  • Boxed, numbered instructions along the left side of the page give you the steps to take.

Explanatory text often follows a step, accompanied by pictures of the Analytica screens similar to the ones you see on your computer. For example:


Tutorial fig2.png


1.  This is an instruction.


2.  In a step, this is the text you will enter.

This is explanatory text.
  • Italic type shows identifiers or titles of Variables and models
  • italic type also identifies special keys on the keyboard, including: Enter, Return, Tab, Delete, Shift, Alt, F1.
  • Bold italic type identifies special Analytica terms or concepts when they are first introduced. Often they are linked to a page that defines and explains them.
Tip
These alert you to useful or important information.

Assumed background

This tutorial assumes that you have basic skills of financial or quantitative modeling — for example, from previously using a spreadsheet program. We also assume you have the basic skills needed to run Windows programs and know how to use pull-down and popup menus, scroll bars, and windows, and know these terms:

Term Meaning
click Press and release the mouse button one time.
double-click Quickly press and release the mouse button two times.
drag Press and hold down the mouse button while moving the cursor to a new location on the screen, then release the mouse button.
press Press and hold down the mouse button.
select Click an interface object, such as a menu command or a cell in a table; selected objects usually appear highlighted.

See Also


Comments


You are not allowed to post comments.