Estimated time to develop a module in Java + Vue.JS. Is 3 weeks too long?

Question

JavaScript

The developer gives an estimate of the time to develop the module at 3 people/week
The essence of the module
Input data:
- Numerical series (time series).
- Input method - from a text file (*.csv)
It is necessary to ensure the creation, deletion of a "forecast".
Choice of forecasting method (1 out of 3).
Click-to-click forecast calculation and graph output.
Output data:
- graph with forecast
Example
Everything should work in the web + database for storing numerical data.
We believe that forecasting methods have already been implemented.
Is 3 weeks enough for such a task?

Answer 1

there are few input data for estimating labor costs. "Module" - does it mean that it is built in somewhere? where ? as ? what are the design requirements? to the code? to the comments? to tests? And in general - what do you need in the end? Java - server side - what's there? or Java on localhost in windows? Or is it JavaScript?
not knowing all this, I would also "break" 3 weeks. although, perhaps, your task is solved in 3 hours.
ps 8*15 = 120 hours... and what is the developer's rate per hour? :)

Answer 2

If there is a skill, then a couple of days for a prototype is enough, then ad infinitum.

Answer 3

lot. look at freelancing orders - admin panels are riveted there in a week. let him describe in detail what he will spend time on and let him commit every hour of work. I’m sure it will do it 2 times faster. in general, a rough estimate assumes an error of 20 percent.

Answer 4

With such a description, a year may not be enough. Precise formulation is the key to a high-quality and fast solution.