Project Management

# Creating a color-coded risk matrix in excel

In the book “Going Agile Project Management Practices”, I describe the use of a color-coded probability and impact matrix for classifying risks. (Figure 1) Visualizing the probability, impact, and severity of risks is a great tool for engaging project team members in risk management.

Figure 1 Example Risk Matrix as Excel Bubble Chart

The following are the instructions I used to create the risk matrix in excel.

# Risk Register

The risk register should include at least four columns, such as (Table 1):

• Short risk name or ID: a short name for the risk that should be displayed in risk bubble and/or legend
• Probability: probability of the risk occurring e.g., scale from 1 to 5.
• Impact (or consequence): consequence or impact of the risk on the project should it occur e.g., scale from 1 to 5.
• Risk Score: The probability times the impact. The risk score can be referred to as severity, consequence, significance, or just risk score. Use whatever term is most meaningful to the team. Table 1 Risk Register Example

# Risk Matrix — Labeled Bubble Chart

The risk matrix can be graphed as a Bubble Chart  in excel (Figure 1) with:

• Probability on the y-axis
• Impact on the x-axis
• Risk Score as the size of the bubble

Note:  In excel, the bubble chart does not display as expected by default. Tom Hollander describes a work around for this odd behavior of excel in his blog post http://blogs.msdn.com/b/tomholl/archive/2011/03/28/creating-multi-series-bubble-charts-in-excel.aspx.

## Chart Background

Change the background of the chart plot area to use the color-coded risk matrix. (Format Plot Area, Fill, Picture or Texture Fill, Picture from File) (Figure 2) Figure 2 Format Plot Area with Color-Coded Matrix

You can download a color-coded matrix to use as a background here. ==> Plot Background

## Chart Axes

Change the horizontal and vertical axes so that the diagram displays as a matrix.

(Format Horizontal axis,  Axis Options–Minimum 0, Maximum 5, Vertical axis crosses–Axis value 2.5)

(Format Vertical axis, Axis Options–Minimun 0, Maximum 5, Horizontal axis crosses–Axis value 2.5)

# Other risk related charts

Other visual charts for risk management include the burndown chart and radar.

Risk Burndown Chart is an area chart with the risk severity on the vertical axis (y-axis) and the time dimension on the horizontal axis (x-axis). It is useful for monitoring the trend of risk severity for individual risks or groups of risks. (Figure 3) Figure 3 Risk Burndown Chart

Risk Radar is a radar chart for the severity of groups of risks. It is useful to visually idea the group of topics that have the most or least risks severity. ( Figure 4)