5
votes
2answers
484 views

Is it okay to add time for “unexpected delays” to a time estimate?

I've landed my first contract (hooray, self employment!) and the company is asking for time estimates. Programmers are notoriously bad at time estimates, and I know I've been laughably wrong ...
0
votes
1answer
87 views

Tool helping with estimations [closed]

I am looking for a tool supporting me with estimations. What I would like to do is to specify a higher level task and break it into several smaller tasks. When a task is small enough, I could assign ...
1
vote
2answers
2k views

How are effort estimations and duration estimations distinct?

How are effort estimations and duration estimations distinct? At present my understanding is that effort is related to the amount of work required for one person to complete a task, and duration is ...
0
votes
1answer
525 views

Where did the estimation rule of thumb originate that time spent will be one-third in each of the following: design, implementation, and testing?

I'm looking for a reference to the following. I commonly hear that one-third of a projects time will be spent in design, one-third in implementation, and one-third in testing. The three phases of ...
11
votes
6answers
2k views

What is the acceptable error margin when estimating a project duration?

The company where I work is aiming to have a 10% maximum error margin.They expect analysts to not miss the estimate by more or less than 10%. I don't know what to think about it, since I got nothing ...
4
votes
3answers
286 views

How should I log time spent on multiple tasks?

In Joel's blog on evidence based scheduling he suggests making estimates based on the smallest unit of work and logging extra work back to the original task. The problem I'm now experiencing is that ...
5
votes
2answers
416 views

Calculation of Milestones/Task list

My project manager assigned me a task to estimate the development time for an iPad application. Lets assume that I gave estimation of 15 working days. He thought that the number of days where too many ...
21
votes
13answers
2k views

Encouraging software engineers to track time

How can I encourage my coworkers to track the time they spend resolving issues and implementing features? We have software to do this, but they just don't enter the numbers. I want the team to get ...
3
votes
5answers
351 views

How do you manage project estimation and managing your teams time

I'm thinking of things like: designating a developer having say 6 hours out of their normal 7.5 hour day dedicated to the project, the rest for other work/company related activity (meetings, emails, ...
4
votes
3answers
6k views

How to calculate the size of a project in the days-person unit of measurement?

Once in a while I have read here and there the size of a project expressed in a matter of days-person or person-day. I may understand what this means, but I don't know on what do people base ...
98
votes
20answers
4k views

Project Manager that wants to lock in time estimate with a signed contract

At a previous employment, a project manager (PM) wasn't satisfied with the delivery time of the code on a project I was on. I was told by my project lead that that the PM was considering having me ...
22
votes
11answers
1k views

What to do when time estimation goes wrong?

Let’s say you estimated time for a case to be 3 days. In day two you notice that the case is growing and new scenarios are popping up which were not counted when the time estimation where done. The ...
8
votes
6answers
540 views

Who should participate in time estimation?

In an IT project: Who should participate in time estimation? Developer, team leader, scrum master and etc? Whose vote should be counted most?