(a)Informal Report
(b)Formal Report
(c)Feasibility Report
(d)Technical and Special Report

The informal report functions to inform, analyze, and recommend. It usually takes the form of a memo, letter or a very short international document like a monthly financial report, monthly activities report, research and development report, etc. This report differs from the formal report in length and formality. It is written according to organization style and rules, but usually does not include the preliminary (front) and supplemental (back) material. The informal report is usually more controversial in tone and typically deals with everyday problems and issues addressed to a narrow readership inside the organization.

Types of informal reports

There are many embodiments of the informal report:

i. Progress report
ii. Sales activity report
iii. Personnel evaluation
iv. Financial report
v. Feasibility report
vi. Literature review
vii. Credit report

Formal Report

The formal report collects and interprets data and reports information. The formal report is complex and may even be produced in bound book volumes. It is often a written account of a major project. Examples of subject matter include new technologies, the advisability of launching a new project line, results of a study or experiment, analysis of relocation for corporate relocation, an annual report, or a year old review of developments in the field.

Technical and Special Reports

The technical report is a category, not by type. Many industries and disciplines need specialized reports. Within the insurance industry and in police work, there are needs for specialized accident or incident reports.

Feasibility report

The feasibility report defines a need or proposed idea, then analyses, compares and recommends a course of action. When your organization is considering a new location, expansion, or purchase of new equipment, for example, it’s imperative that you look closely to see which course of action is best and if that course of action is likely to succeed.