Estimation is the process of finding an estimate, or approximation, which is a value that is usable for some purpose even if input data may be incomplete, uncertain, or unstable.

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How to estimate a timeboxed spike using story points?

So my team and I are quite new to Scrum and today moved from estimating in Ideal Hours to Story Points. All seems sound rationale, BUT with timeboxed activities. Here is the case, we have an ...
6
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3answers
4k views

What is a good estimation technique for initial, high-level estimates?

I'm currently using Planning Poker to do our detailed estimates. This works great but relies upon a fairly detailed work breakdown. Often it takes 6-8 weeks to get a sufficiently detailed design and ...
6
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3answers
381 views

What are the most relevant books on software task estimation for individuals?

What books have you read that helped you, as a programmer, learn to estimate time for completing small-to-medium programming tasks, such as bug fixes or implementing new features? Which have you the ...
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4answers
2k views

In Scrum, what to do when story points and task hours don't roughly correlate?

Our development team is pretty new to the scrum process, so I would like to help refine our methods to make better use of it. In particular, I noticed that the correlation between story points and ...
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6answers
264 views

In scrum, how do you give an estimate for a backlog item that is primarily research?

A few sprints ago I was assigned a task that was primarily research. I had to figure out how to get our product to interoperate with a very complex black box that we did not develop. I couldn't ...
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6answers
2k views

What are the methods to estimate source code value?

I've been working on some project on my free time for the past few months. Recently I've been approached by friends to build a startup, and this source code would be very valuable to us. As a ...
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7answers
2k views

What is the relationship between the time it takes to develop N lines of code and 4N lines of code?

It took me time T to develop program A, which is measured at 1000 lines of code (SLOC), in certain a language and domain and of a certain complexity. Is there a method to determine how much time it ...
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5answers
1k views

Should you ever re-estimate user stories?

My current project is having a 'discussion' which is split down the middle- "this story is more complex than we originally thought, we should re-estimate" vs "you should never re-estimate as you only ...
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2answers
641 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 ...
5
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4answers
606 views

Why is it suggested stories be sized to 2-3 days?

If sprints are on average 10 days, why is it often suggested stories be sized to 2-3 days? Related Question: How to handle backlog-items that are longer than one sprint?
5
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1answer
228 views

Why is there a 20 and not 21 in some versions of Planning Poker?

In Planning Poker, cards usually contain numbers of the Fibonacci sequence, which is 0,1,1,2,3,5,8,13,21,34,55 etc. However, you can see on the Wikipedia page (and this has been confirmed to me by ...
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2answers
465 views

How do I survive in a Waterfall world? [duplicate]

I currently work in a company where the Waterfall model is deeply ingrained. We are pushing Agile principles but it's a long process. Meanwhile, I have to work in a Waterfall world with sequential ...
5
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2answers
482 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 ...
5
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6answers
184 views

Is timing exactly how much time each team member spends on a story useful in Scrum?

One of my colleagues has suggested timing how much time each team member spends on each user story. This seems to me likely confusing for the dev team during the iteration, and misleading as a metric ...
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3answers
1k views

Many user stories share the same technical tasks: what to do?

A little introduction to my case: As part of a bigger product, my team is asked to realize a small IDE for a DSL. The user of this product will be able to make function calls in the code and we are ...
5
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1answer
160 views

Estimation of Effort and Schedule for a project with almost no familiar elements

To the best of my understanding the schedule for the project is derived using the effort estimates for the individual tasks (in person hours), and the number of relevant resources used for the ...
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4answers
367 views

What do you do to estimates for agile stories where developers are pair programming?

If it was a 2-point story for one person, would you double it if people are pairing? Pairing isn't always necessarily done 100% of a dev task, so it seems that doubling the story points seems ...
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4answers
665 views

Freelancing - Getting paid for the quote or estimate

It is often necessary to spend time designing a solution, breaking down the design into tasks and sub tasks and estimating the time it will take to complete each task in order to produce a reasonable ...
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6answers
559 views

How to measure when a software project is complete?

I have very limited experience in software project management roles, and I was asked this question by another engineer and I was sort of stumped. How do I measure when a software project is complete? ...
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3answers
405 views

How to infer my Assumptions I based my time estimate on?

In an answer on how to make time estimates it is said to write down all your assumptions you made when estimating a project. Seems like a good plan. Problem is, by assuming I already made an ass out ...
4
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4answers
885 views

If a story is de-scoped during the iteration then what to do with its estimate/size?

Sometimes we change user story scope to complete it during the iteration. For example, Original story (8 points): As a user i want to save my data as PDF. De-Scoped story: As a user i want to save ...
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7answers
3k views

What assumptions / disclaimers should be included with a software estimate?

I'm writing a lot of estimates lately and I'm finding that quite often, a client might argue scope, deliverables or (most often) cost. In an effort to ensure that the breadth of coverage (of client ...
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2answers
507 views

Daily Scrum Meeting (Burndown chart)

Here is an example: early in the morning of the second day of the Sprint (during the stand up) I go to the board and see that the story I worked the previous day (first day of Sprint) contains a big ...
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3answers
9k 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 ...
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4answers
244 views

Independency and estimation of user stories that rely on shared predecessor

Lest's say I have user stories about using product catalog in shop: As an administrator I can add/modify/delete catalog items (one or more user story, doesn't matter here) As a customer I can search ...
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4answers
441 views

In what visual format should I present an estimate for a software project?

What I mean is, do people print some kind of line item form? What data does it contain? What are the line items usually? Otherwise, do you just present a written document describing with a paragraph? ...
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2answers
400 views

Efficient way to create a code estimation/technical specification in a fast-moving environment

To better understand my question, let me elaborate the background of the subject matter. I work in a financial institution where the business module (credit finance) is constantly changing. In the IT ...
3
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3answers
452 views

Effective way to estimate dead code removal?

I've been working in an application with about 100k LOCs and basically We have been reworking features to comply with a new architecture based on a new technology stack. This work is almost finished ...
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6answers
450 views

Finishing an iteration early

I'd like some input on this on those working with agile methodologies... A current project is finding that development on our planned user stories is finishing some time before the end of the ...
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4answers
277 views

is there any relationship between a story point in two different projects?

Assume we have two projects and one or more teams (one team doing the projects in serial or two teams doing the projects in parallel). If Team A decides that a task is 8 story points and Team B ...
3
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1answer
269 views

How do you work out timings for larger projects?

I work for a small company that hasn't done much work in bespoke development. It's something we're growing into. With all our projects, whether a bespoke development piece of work, or a simple ...
3
votes
1answer
459 views

Using function points as a metric for the velocity of a Scrum team?

I came across the idea of using function points as a metric for the velocity of a Scrum team. I saw it in a team and I found two articles mentioning a link between estimates and function points ...
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2answers
350 views

Can I trust the Basic schedule equation?

I've been reading Steve McConnell's demystifying the black art of estimating book, and he gives an equation for estimating nominal schedule based on Person-months of effort: ScheduleInMonths = 3.0 x ...
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2answers
181 views

Resource for common ballparks in development projects? [closed]

Does anyone know of any resource which gives some man-hour ballparks for common types of development projects? I realize it's going to vary wildly by framework/language/the skill levels of the ...
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2answers
2k views

Story Point Estimation vs Ideal Days Estimation

In my project we assign 4 hours for 1 story point and estimate based on story point. So in this case one ideal day of work will be done in 2 elapsed days. From an agile standpoint are we doing story ...
2
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3answers
589 views

Setting Deadlines in software development [duplicate]

I have been working on a system alone for about two years. I inherited the system from a contractor who spent about two years working on it before me (alone). The system is not particularly well ...
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2answers
1k views

Good examples for teaching software estimation (size, schedule, effort)?

I'm going to be teaching a class that covers a broad brush of estimation techniques. I intend to cover absolute estimation techniques based on SLOC (e.g. Function Points, COCOMO II etc.) and ...
2
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4answers
129 views

Estimation of your backlog

How far in advance should you estimate stories in your backlog? My concern is that estimates that are 6 months out will become out of date as you develop features in the current sprint. I thought ...
2
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5answers
297 views

Scrum task over estimation

In my current company we're using Scrum with 2 week iterations and a regular planning session. How planning normally works in our company is that we take a predefined , prioritized (by PO before the ...
2
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2answers
215 views

Using Completed User Stories to Estimate Future User Stories

In Scrum/Agile, the complexity of a user story can be estimated in story points. After completing some user stories, a programmer or team of programmers can use those experiences to better estimate ...
2
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2answers
371 views

Estimating time for planning and technical design using Evidence Based Scheduling

I'm at the beginning of a development project in a large organization. The Functional Requirements are currently being worked out and documented with our business stakeholders by our Enterprise ...
2
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2answers
3k views

Closest Point of Approach (CPA) mathematical formula in ship radar

I was recently searching for the mathematical formula to find closest point of approach (CPA) between one ship and another ship. I need to apply the formula in my radar ship program and I can't find ...
2
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2answers
237 views

If you have several SCRUM teams working on one backlog, how do you divide story point estimation between those teams?

I'm asking because approach in my company looks as follows: stories in the backlog are not estimated team that picks the story estimates it in story points during sprint planning part two
2
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3answers
272 views

Delivering estimates and client expectations?

When a client asks for an estimate on how long it would take to develop different sections of an app, is it best to give them a total amount or what it would take for each section? Is it better/more ...
2
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1answer
90 views

Scrum: Capacity vs Velocity when planning a sprint

We have completed 11 sprints so far in our current project. In most sprints we have not been burning down well and usually finish with our velocity gradient flattening as we approach the end of the ...
2
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2answers
658 views

What is the significance of 10 characters in this Uncle Bob post?

In this blog posting by Uncle Bob http://blog.8thlight.com/uncle-bob/2012/04/20/Why-Is-Estimating-So-Hard.html Author states a possible solution to the problem at hand. He writes "Try this. Break ...
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1answer
1k views

Personal Software Process (PSP1)

I'm trying to figure out an exercise but it doesn't really makes to much sense.. I'm not asking someone to provide the solution. just to try and analyse what needs to be done in order to solve this. ...
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2answers
607 views

How to ensure a project 100% tested?

I want to know how exactly, we can ensure that a project is 100% tested ? In banking or financial applications not 1% also tolerable. So being a developer, how can you say your code is 100% tested? ...
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5answers
2k views

Statistics on time estimates for web application

I have been asked to help estimate the time it would take to develop a web application. I will not be involved in the actual programming, but I am participating as an "experienced" programmer. The ...
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1answer
254 views

What is the significance of the output of Function Point analysis

I am a beginner in Software Engineering principles. This question have only academic significance. I read about Function Point analysis.We will be getting an integer value as output for Function ...