One of the key considerations in data preparation is where to hold the output. After all, what is the point of doing all that hard work if you then put the data somewhere that is:
Inaccessible to those who need to use the data
Slow or unresponsive
Not protected against accidental overwrites, risking permanent loss of the source data
Let’s consider each of these scenarios in turn to determine what you should consider when writing your output to a location (Figure 45-1).
Figure 45-1. The Output step in Prep
Inaccessibility
As the previous chapter discussed, it can be challenging to find the right balance between data openness and data security. More restrictive data legislation is being passed across the world as the general public realizes the value of their personal data and the potential effects of a data breach on their lives. At the same time, without breaking any rules or laws, giving people freedom to work with data will lead to future innovation and better, more efficient decisions. So how can you strike this balance? Well, let’s first consider the absolute don’ts of data access.
Don’t Break the Law
There are some things that you just can’t do, and breaking the law is one of them. The following are two important things to keep in mind.
Personally identifiable information
Personally identifiable information (PII) is any data that can ...
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