Ordinal vs Cardinal trong luyện thi PMI-RMP

Đôi khi trong đề thi PMI-RMP sẽ cho bạn một chuỗi những dự liệu (định lượng hoặc định tính) và hỏi bạn đây là thuộc loại dữ liệu nào. Trong đó phổ biến nhất bạn cần phải nắm Ordinal và Cardinal.

Ordinal là thang đo định tính. Vd: Low, Medium, High…

Cardinal là thang đo định lượng. Cardinal/quantitative scales assign numeric values and can be either linear such as this example (.1 .3 .5 .7 .9) or non-linear for example:  .05 .1 .2 .4 .8.

#PS054 – Alana works in the PMO and one of her main responsibilities is to develop policies and templates for projects to ensure consistency throughout the organization. She is working on creating the template for the risk management plan. Under the P/I section she has decided to use a rating scale that uses numbers .1 .3 .5 .7 .9. What type of scale is this?

A. Non linear

B. Ordinal

C. Cardinal

D. Continuous

C is correct:  Cardinal/quantitative scales assign numeric values and can be either linear such as this example or non-linear for example:  .05 .1 .2 .4 .8.

B is not correct:  Ordinal/qualitative scales are rank-ordered values, such as, very low, low, moderate, high, and very high.

A is not correct:  Cardinal non-linear would be .05 .1 .2 .4 .8.

PMBOK Guide – Fifth Edition: Chapter 11 Risk 11.3.2.2 Perform Qualitative Risk Analysis TnT Page 331 – 332

#PS218 – Alana works in the PMO and one of her main responsibilities is to develop policies and templates for projects to ensure consistency throughout the organization. She is working on creating the template for the risk management plan. Under the P/I section she has decided to use a rating scale that uses low, medium and high designation. What type of scale is this?

A. Non-linear

B. Ordinal

C. Cardinal

D. Continuous

B is correct:  Ordinal/qualitative scales are rank-ordered values, such as, very low, low, moderate, high, and very high.

C is not correct:  Cardinal/quantitative scales assign numeric values to these impacts.

A is not correct:  Cardinal scales are usually linear example: (.1 .3 .5 .7 .9) but are often nonlinear (.05 .1 .2  .4 .8).

You are using an ordinal scale to determine the severity level of risks. You have identified a risk whose impact on the project is low and probability is very low. On the ordinal scale, what would the color code of this risk be?

(a) Green

(b) Red

(c) Yellow

(d) Green-Yellow