The first 90 percent of the code accounts for the first 90 percent of the development time. The remaining 10 percent of the code accounts for the other 90 percent of the development time. Tom Cargill, Bell Labs
The first 90 percent of the code accounts for the first 90 percent of the development time. The remaining 10 percent of the code accounts for the other 90 percent of the development time.
Tom Cargill, Bell Labs
What one programmer can do in one month, two programmers can do in two months. Fred Brooks
What one programmer can do in one month, two programmers can do in two months.
Fred Brooks
source
https://www.pointingpoker.com/
1 Point: a straightforward task that requires minimal implementation and integration effort. (half workday)
3 Points: involves some additional functionality, but is still relatively simple to implement. (1-2 workdays)
5 Points: involves moderate effort. (3 workdays)
8 Points: requires a significant amount of effort. (~5 workdays)
13 Points: a more challenging and time-consuming task. (~10 workdays)
As a user, I want to be able to search for products by their name, so that I can quickly find the items I'm interested in.
As a user, I want to be able to register with my email and password, so that I can create an account and access the application.
As a user, I want to receive email notifications whenever my order status changes, so that I can stay updated on the progress of my purchases.
As a user, I want to be able to upload a profile picture, so that I can personalize my profile.
As a user, I want to be able to create and manage multiple shopping lists, so that I can categorize my desired items for different occasions or stores.
A guide to producing software estimates
A counterpoint: Why software estimation is a losing game
I tend to agree with the latter ^
Building software with David Heinemeier Hansson
Flaws in Scrum and Agile