# Analytical Tool

Topics: Arithmetic mean, Average, Mean Pages: 5 (1555 words) Published: January 3, 2013
Analytical tool

An analytical tool is something used to analyze or "take a closer look at" something. It is normally a way to review the effectiveness of something. For example, Google offers a free web analytics tool that is used by Web Masters to track visitors on a given site. It allows Web Masters to see where visitors are coming from, how long they stay, what links they are reviewing, etc. Analytic Tool help with Tracking and Reports!

Data flow diagram
-A data flow diagram (DFD) is a graphical representation of the "flow" of data through an information system, modeling its process aspects. Often they are a preliminary step used to create an overview of the system which can later be elaborated.[2]DFDs can also be used for the visualization of data processing (structured design). Diagram

HIPO
-The HIPO (Hierarchy plus Input-Process-Output) technique is a tool for planning and/or documenting a computer program. A HIPO model consists of a hierarchy chart that graphically represents the program’s control structure and a set of IPO (Input-Process-Output) charts that describe the inputs to, the outputs from, and the functions (or processes) performed by each module on the hierarchy chart. Using the HIPO technique, designers can evaluate and refine a program’s design, and correct flaws prior to implementation. Given the graphic nature of HIPO, users and managers can easily follow a program’s structure. The hierarchy chart serves as a useful planning and visualization document for managing the program development process. The IPO charts define for the programmer each module’s inputs, outputs, and algorithms. The HIPO technique is often used to plan or document a structured program (# 62). A variety of tools, including pseudocode (# 59) and structured English (# 60), can be used to describe processes on an IPO chart. System flowcharting symbols (# 37) are sometimes used to identify physical input, output, and storage devices on an IPO chart. A completed HIPO package has two parts. A hierarchy chart is used to represent the top-down structure of the program. For each module depicted on the hierarchy chart, an IPO (Input-Process-Output) chart is used to describe the inputs to, the outputs from, and the process performed by the module.

VTOC
-In the IBM mainframe storage architecture, Volume Table Of Contents, or VTOC, is a data structure that provides a way of locating the data sets that reside on a particular disk volume. It can reside within the first 64K tracks on the volume, and lists the names of each data set on the volume as well as size, location, and permissions. Additionally, it contains an entry for every area of contiguous free space on the volume. The third record on the first track of the first cylinder of any volume of DASD (i.e. disk pack) is known as the volume label and must contain a pointer to the location of the VTOC. A VTOC is added to a disk when it is initialized using the Device Support Facilities utility program, ICKDSF. VTOC was originally designed for removable disk packs. To locate a data set, a program will generally interrogate a z/OS catalog to find the volume where the data set resides. Having found the correct volume, the VTOC is searched to find out where on the disk the data set is stored.

Statist treatment of the data
Statistical treatment of data is essential in order to make use of the data in the right form. Raw data collection is only one aspect of any experiment; the organization of data is equally important so that appropriate conclusions can be drawn. This is what statistical treatment of data is all about.

Frequency distribution
In statistics, a frequency distribution is an arrangement of the values that one or more variables take in a sample. Each entry in the table contains the frequency or count of the occurrences of values within a particular group or interval, and in this way, the table summarizes the distribution of values in the sample A frequency distribution...