The answer depends on the type of qualitative data.
You would use your taste buds as tools to distinguish between sweet, sour, salt and so on.
You could use you sight to determine the colour of eyes, hair or cars.
You would use your own judgement to choose between "strongly agree", "agree", "disagree" or "strongly disagree".
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Area codes are discrete data.
The mode is the only one of these measure which can be used with qualitative data: the mean or median are impossible to compute. Also, for a data set consisting of a relatively small number of observations of a discrete variable the mode or modal class is the easiest to find.
Quantitative forecasting tools are used to predict future figures and quantities such as sizes and lengths. Qualitative forecasting tools are used to predict what something in the future will be like in terms of things other than set figures. For instance, they could predict what type a future element will be; what color it will be; what the nature of it will be.
Gostats and GA are two the analytics tools that I use. You can setup unlimited goals with Gostats and they can be used to track the best conversion rates, check your sales funnel and referral data to get the best results.
Quantitative data may be used to make a graph or table. Qualitative is easier to explain with numbers or a written description.