Data, declarations, preferences: the Odisage method
In front of a product, information of very different kinds arrives: measured numbers, manufacturer declarations, design choices, opinions, marketing messages. Mixing them leads to hasty conclusions, such as thinking that more power means more quality. This guide describes how Odisage tells six kinds of information apart, why it shows several parameters instead of just one and why it does not stop at a single number. It is the thread that ties the other guides together and the way product sheets and comparisons are built.
Six kinds of information
Almost every piece of data in a product sheet belongs to one of these kinds.
| Kind | What it is | Example |
|---|---|---|
| Technical data | A quantity describable with a measurement | Weight in grams, grip diameter in millimetres |
| Manufacturer's declaration | A value stated by the maker, often without independent verification | Runtime, stroke, voltage range |
| Measurement | A value obtained by a test, with a known method | Weight read on a scale |
| Design characteristic | A construction choice | Architecture, motor type, attachment system |
| Personal preference | How a characteristic is experienced by whoever uses it | Grip comfort, feel at work |
| Marketing | A message designed to make a product preferred | "Power without compromise", "the professionals' choice" |
The same datum can change kind depending on how it is read. A machine's weight is a measurement if someone has taken it, a declaration if the manufacturer reports it. Telling them apart is not about distrusting everything: it is about knowing how much weight to give each piece of information.
Four shortcuts that lead astray
Some equivalences are widespread because they are simple, but they do not hold.
- Longer stroke = better machine? No. A different stroke changes behaviour, not the level of quality, and depends on the rest of the design.
- Greater runtime = better ergonomics? No. Runtime concerns energy; ergonomics depends on weight, balance and grip, and a bigger battery can also add weight.
- More power = more quality? No. Power is a quantity, not a judgement, and a more powerful motor says nothing about precision or durability.
- Lower weight = more comfort? Not automatically. Weight distribution, shape and grip diameter also count.
In all these cases a characteristic is mistaken for a consequence. The next step is to ask what the datum really says, and what it does not.
Why Odisage shows several parameters
A sheet with one number, or one score, invites a quick conclusion. A sheet with many parameters, organised in groups, invites a comparison. That is why Odisage shows technical specifications, states when a datum comes only from the manufacturer and leaves empty the fields it does not know, instead of filling them with estimates.
The Compare function exists for the same reason: it places several products side by side on the same parameters, so differences become visible. Comparison does not assign a winner: it shows where products diverge.
And the Odisage Score?
The Odisage Score is a summary indicator calculated with declared criteria (build quality, performance, reliability, ergonomics, value for money), starting from independent research and not from the manufacturer's specifications alone. It also reports the confidence level of the sources. It is a starting point, not a verdict: the Methodology page explains how it is made, which sources are considered and when a score is updated.
A method in four questions
In front of any piece of information about a product, four questions help place it.
- Who says so? The manufacturer, a measurement, a user, a promotional text.
- Under what conditions? With which configuration, with which battery, in which test.
- What does it not say? Which other quantities are needed to interpret it.
- How much depends on me? If it is a personal preference, no data can answer in my place.
Related terms: Stroke · Voltage · Runtime · Weight · Balance · Grip diameter · Materials
Related guides: How to read the specifications of a tattoo machine · How to compare two tattoo machines
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