Questions tagged [estimation]

For questions about the estimation of the project's parameters, such as time or cost.

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149
votes
18answers
88k views

Why use story points instead of hours for estimating?

After using hours to estimate our projects for a long time and rarely coming within 20% of actual "work-to-ship," I have been told by a handful of people that "points" work a lot better at gauging the ...
1
vote
3answers
74 views

Stakeholder view of projects without time?

I'm a PM for a small development team. We have a mix of large transformation projects and small improvement projects. We're not good at estimating in man hours (and in fact I'm yet to meet a team of ...
3
votes
2answers
239 views

Non-measurable works should be done in scrum process?

I think that I have some misunderstandings from scrum. Estimates of some tasks are not measurable. For example researching about something or talking about company road map and etc. I can't estimate ...
18
votes
4answers
3k views

Budgeting in an agile project

I'm really confused on how agile projects are budgeted for cost and effort before the project starts. Cause the user stories are never completely discussed and estimated as a practice in agile. So if ...
1
vote
1answer
73 views

Unable to determine the actor in UCP estimation for a given scenario

I have just started using Use Case Points recently. Apparently it looks simple to use but there are certain scenarios where it is difficult to figure out the right transaction count or actor count. ...
0
votes
1answer
8k views

Effort Estimation in Production Support Projects [closed]

How can we do the effort estimation for Production support projects? Need to decide count of resources in L1,L2 and L3? I have 2 projects - 1)Apps with few months of Ticket details 2)Apps with No ...
2
votes
1answer
66 views

How to estimate the value of software for a control system?

Control systems are like computers, but sometimes less so. For the current discussion, it can be assumed that some custom effort maybe needed to make the same code work on different platforms. With ...
1
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2answers
110 views

Estimating and Project budgets

I'd be interested to hear how you manage dealing with project budgets when having to provide a fixed cost up front for the customer ahead of starting the work? For context, and without giving too ...
1
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3answers
127 views

How do you write completable “stories” when all members of a team have a specialty?

From a user perspective our stories seem clear. From a engineering perspective our stories are a bit too broad and need to be broken up into sub-tasks. This is OK, but each member of the team has a ...
1
vote
2answers
172 views

How many developers do we need? How much time?

We are currently using Scrum and we are evolving into Kanban. At the same time, we are starting a migration from version 1 of our underlying framework to version 2. There is a target date of January 1 ...
0
votes
1answer
72 views

How to create a schedule for a UX process?

I started to work on a new project ( software development) an my boss asked me: "what are the next steps? I need a schedule!" We're at the beginning, doing some user tests and researches about the ux ...
1
vote
1answer
304 views

How to determine hours spent on a project if didn't record them at the time?

How can I produce an accurate determination of hours spent on projects in the past when I didn't record the time spent at the time? I used to own my own business putting on concerts in the Seattle ...
5
votes
2answers
1k views

How to allocate story points on extremely complex user stories?

We currently allocated story points the following way: 0.5 very simple (approx 0-30 mins) 1 simple (approx half a day) 2 Medium difficulty (couple of days) 3 Hard (3 days) This works well for us, ...
6
votes
5answers
5k views

Jira story points versus sub task estimation

We are using Jira for agile PM, but are having problems working with both story points and sub task hours estimation. Articles like this and this just don't seem to help. The second article has a ...
7
votes
7answers
1k views

Developers don't like to estimate. What can I do to improve the process?

I have two kinds of projects: Agile where estimates made with story points using planning poker http://www.planitpoker.com/ Waterfall/Kanban where estimates made on hours/days divided to specialty. ...
7
votes
7answers
856 views

How to make Release Planning more accurate?

I had an interview with one company. They use Scrum, but don’t like rough estimates during Release Planning. So, they asked me, how to make Release Planning more accurate (they don’t want more than 30 ...
2
votes
2answers
559 views

Why in PERT the activities duration follows a Beta distribution

studying the details of PERT/CPM, I'm perplexed when I read the formula of duration of an activity is expected time = (opt. time + 4medium + pess. time) ÷ 6 because it's following a Beta ...
4
votes
1answer
127 views

Pragmatic method to check/improve effort calculations

Somebody asked me to look over their cost calculation for an internal IT project in the 1.5 mio € range. They did some eyeballing, and are now asking me to cross-check it for them with a few hours of ...
3
votes
1answer
100 views

Deal with unestimated Defect-Tasks in Sprint for Veloctity calculation

As said many times before (1, 2, 3): "Do not estimate bugs / defects". I know in Scrum we try to minimize the defect rate, but it happens now and then. Fixing such unestimated tasks might have ...
3
votes
1answer
133 views

Conversion from complexity estimation to actual costs

We do Scrum - therefore we do not estimate hours or workdays, but estimate complexity (Story Points). As our customers mostly want to know what a feature might cost, we somehow have to do a ...
1
vote
1answer
194 views

Is COCOMO 2 Estimation Sound, or is there Something Better?

I am reading about COMOMO estimation and what I see is margin of error is almost always too high. Also I didn't like the idea to use lines of code to measure progress. So I wonder is COMOMO really a ...
4
votes
2answers
162 views

What methods are there to figure out how adding people to the project will reduce the amount of time needed?

I've been asked to estimate how long it will take for a big project to get done, and I was able to break it up into small tasks and come up with an estimate for one person do it. However, I'm now ...
5
votes
2answers
1k views

T-Shirt Size and total estimation, how to manage them?

I'm working on a project and the Product Owner has to decide if and how many new game-features implement in a SmartPhone app. Those game-features have the goal of keep the user more active inside the ...
8
votes
3answers
2k views

Sprint Burndown chart and tasks estimation in time

I worked as a developer Team Leader, than we became Agile and I took the role of Scrum Master (SM). In the meantime, I've switched to Project Management, but remained in contact with Agile and Scrum, ...
0
votes
1answer
78 views

Scheduling hours over a fixed duration in MS-Project 2013

I am new to Project and, rather than spending anymore time reading the web, I thought I'd appeal to some experts. In our company we often schedule tasks similar to the made-up one just below. We are ...
1
vote
1answer
92 views

How does the public sector estimate the cost of large-scale infrastructure projects?

Using the example of the proposed Donald Trump Mexico-USA Border Wall; various figures for the estimated cost have ranged considerably. Mr Trump claims the total cost of the wall will be $10bn (£...
3
votes
3answers
389 views

How can we manage schedule risks brought into a project by 3rd party software?

Working in web-development, I face a common situation when clients want to use 3rd party software as a starting point of the project. That could be a CMS, an e-commerce site, or something else. ...
-2
votes
1answer
103 views

Scenario based Use case point estimation counting

I am new to use case base estimation technique. I have the following scenario and facing little difficult to conclude my use case point count. Suppose I need to execute 3 steps one after another. Each ...
1
vote
1answer
467 views

EQ/EO determination from a functional point sizing perspective

I am new to function point(FP) estimation. I am considering the following cases would be considered as External Inquery(EQ)/ External Output(EO) in function point sizing perspective. Please correct me ...
13
votes
4answers
1k views

Forecasting Story Points in Agile

Are there any methods to fairly estimate story points for a project before deep diving into the planning poker part. I am asking this because sometimes at project initiation it helps to know the ...
11
votes
6answers
2k views

Is it possible to forecast when a scrum team will complete the product backlog?

This question is related to this question but I couldn't find this part answered there. I am part of a large project whose entire product backlog has been sized in story-points. The estimate is ...
0
votes
1answer
161 views

Governance cost as percentage of FTEs

In an Outsourcing IT project we are are trying to estimate the relationship between the governance cost and the project size in FTE. For example, if the governance cost of a 500 FTEs project is X ...
3
votes
3answers
337 views

How (and in what units) to measure the product scope?

Short version: How and in which units is it better to measure the product scope (volume of incoming requirements / amount of business functionality) if different parts of product (different ...
14
votes
4answers
3k views

Should velocity increase with time?

Some scrum masters are concerned with "bumping up" a team's velocity during a sprint, as if a higher velocity is better. But points are a relative measure of the work that a team needs to do for ...
4
votes
3answers
650 views

How to address friction between estimation requests and delivery commitment

I'm working on a large program, of which my team are a small but vital part. We have three development teams on aligned on three weekly sprint cycles. We assign stories from the backlog based on a ...
3
votes
2answers
205 views

How can I produce more reliable estimates for technology refresh projects?

After running a few projects that refresh technology rather than add functionality, I've noticed a few recurring themes: Technology refresh projects are more likely to go over budget/schedule; ...
2
votes
3answers
201 views

How to shift to the semi-automatic estimation of the projects?

I am working at a custom software development company. The number of incoming custom projects has increased over the last few years. The first problem is that not all customers are willing to pay us ...
20
votes
5answers
6k views

How should a team handle disagreements about story-point estimates in Scrum?

During estimation, the Product Owner presents a user story that seems clear to a team that usually knows their strengths and weaknesses, and that is not hostile. What should the Scrum Master do if the ...
13
votes
4answers
264 views

Eliciting Requirements as a Client

Background: I am a computer science student and am currently employed as a programmer for a health institution. Recently we discovered the need for a project which is beyond a 1-man job (I am their ...
6
votes
2answers
380 views

Small firm with 4 developers and 2 project managers in need of some guidance for project workflow

I work as a developer in a small IT firm with 4 developers and 2 project managers. We currently implement some sort of traditional project management, in which the workflow for a given project is as ...
8
votes
3answers
9k views

How to estimate a project budget using story points?

Current workflow in our company: I create Given/When/Then scenarios or User stories Developers estimate Scenarios/User stories in hours, by giving minimum and maximum amount of time for 1 scenario/...
4
votes
4answers
626 views

Should a team estimate tasks based on the executor's capacity or on the team average?

My team is adopting Scrum. When estimating story points for a backlog item, we use planning poker to reflect the team's average vision of the story's complexity. When estimating task hours within a ...
0
votes
1answer
83 views

My Project Milestones Do not Represent My Current Tasks. What should I do to track my project?

I am involved in a project for my summer internship. Prior to the start of the internship, I have set several milestones to help me track the progress made toward reaching the goals of the project. ...
4
votes
5answers
1k views

How granular should an estimate be for building a web page?

Sufficient Granularity? I have a ASP.NET web page to construct. The design of the UI and classes is already complete. I have prepared a task breakdown, including hours needed for each task. Does ...
0
votes
3answers
2k views

How to estimate times during Sprint Planning?

I have 6 user stories for a sprint of 14 days. I have the detailed description in the stories for what the team needs to develop, and the team is new to scrum. (this would be their 2nd sprint). The ...
1
vote
3answers
103 views

Estimate depending work items in Scrum

Scenario: Let's say there are two items A and B in the product backlog of a Scrum team. From a PO point of view B has more customer value than A and is therefore ranked higher. When asking a developer ...
2
votes
3answers
228 views

How to estimate number of resources when I have my timelines fixed, but work effort is more

My total work estimate is 1056 man days Release Start time: May 10 Release End time: October 10 total Work days available: 101 1056 / 101 = 11 resource Approx. Is this correct calculation? If not ...
1
vote
1answer
1k views

When are Story Points and priority estimated in the planning phase of agile?

In our agile requirements gathering sessions (not sure of the technical name sorry), where we engage with the product owner to list all stories that are required for the implementation, we typically ...
4
votes
6answers
2k views

What questions would you recommend to put into project estimation checklist?

I would like to create common checklist for project estimation in my organization. The idea behind is to make sure that you have taken into account different aspects (ie. lack of knowledge of given ...
4
votes
4answers
4k views

How to measure percentage complete on an Agile project?

What do you do when management asks for a percentage complete on an Agile project?