What are the main analysis methods of investment deviation in interior decoration engineering? What are the advantages and disadvantages of each method?

Curve method, table method and bar chart method.

Analyzing investment deviation with histogram method means using different histograms to identify planned investment, planned investment and actual investment of completed projects, and the length of the histogram is in direct proportion to its amount. Bar chart method has the advantages of image, intuition and clarity, but it reflects less information.

Tabular method is the most commonly used method for deviation analysis, which integrates the project number, name, investment parameters and investment deviation into a table and compares them directly in the table. Because all deviation parameters are listed in the table, the investment manager can fully understand and process these data. It has the advantages of flexibility, strong applicability, large amount of information and convenience. Curve method is a method to analyze investment deviation by using investment accumulation curve. In the relationship curve between investment and time, three corresponding curves are marked, namely, actual investment of completed projects, planned investment of completed projects and planned investment of completed projects. These curves can be used to analyze the investment deviation and schedule deviation of the project. It is also vivid and intuitive to analyze the deviation by curve method, but it is difficult to directly use this method for quantitative analysis.