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SLIM-Estimate for Software Project Estimation

SLIM gives you the power to make realistic, data-driven software cost and schedule estimates.

Fast and Accurate Software Project Estimates

Are spreadsheet estimates failing to deliver? Do you struggle to determine whether cost, schedule, and scope expectations are realistic or recipes for disaster? Are you having trouble aligning your "realistic" project or portfolio resource demand with fixed resource capacity? Then it’s time to graduate from clumsy spreadsheets to the industry’s best systems and software project estimation tool–QSM’s SLIM-Estimate.

With SLIM-Estimate, you’ll instantly know the cost, time, and effort required to satisfy any set of requirements, and the best strategies for designing and implementing your software project.

SLIM-Estimate uses a proven top-down approach that minimizes the input information required to produce fact-based, defensible estimates. In addition to software cost estimation, SLIM-Estimate’s high level of configurability accommodates the many different methods used by developers today, including agile development, business intelligence, package implementation, hardware, call center development, infrastructure, model-based development, engineering and architecture design, service-oriented architecture, SAP, Oracle, and more.

SLIM-Estimate

Top-down scope-based software project estimation

SLIM-DataManager
Historical project data to validate software estimates
SLIM-Estimate
Fast, accurate feasibility and detailed software project estimates
SLIM-Control
Project plan metrics to track against actuals

How It Fits in the SLIM Ecosystem

Successful software projects start with accurate estimates.  SLIM-Estimate computes software project estimates using QSM’s Software Lifecycle Model, which established the fundamental relationships between software size, productivity, time, and effort in software development.  It predicts software project outcomes and enables you to simulate different scenarios and make better business decisions about your software projects before committing resources.

Accurate software project estimates are based on data.  SLIM-DataManager helps you capture, organize, and analyze data from completed software projects to provide a solid, defensible basis for estimation. Historical data, from the QSM Industry Database or your own, also serves as a source of key inputs – software size, productivity, time, and effort – so you can get estimates quickly, even when little is known about the scope.

Workable software project plans are derived from accurate estimates.  SLIM-Estimate provides high-level staffing, effort, cost, product construction, and quality plans for SLIM-Control to track and forecast in-progress projects or releases. It warns you when actual performance deviates from the plan and creates forecasts based on your actual software productivity.
 

Key Features

Evaluate and Adjust Solution Risk

Interactive Estimate Analysis dashboards display key software project assumptions and estimated outcomes with associated risks. Quickly and easily make adjustments to visualize time-effort tradeoffs and increase the probability of meeting constraints.

  • Average Staff vs Time with Agile sprint lines clearly show how changes in one affect the other
  • Use the Control  Panel dials to see the impact of increasing or decreasing software  size, productivity, or peak staff
  • Solution Panel lists core management metrics (Duration, Effort, Cost, Peak Staff, Avg Staff, and Reliability) for the development and test phase, plus project life cycle totals
  • Assess the probability of meeting constraints. Slide the Risk Gauge arrows to see what is required to meet constraints and generate risk-buffered solutions
Software project estimate showing results, average staff versus duration, a risk gauge, alternative solution controls.

Software Size Estimate Calculator

SLIM's top-down estimation methodology begins with estimating software size (scope) because it drives effort, cost, staffing, and duration. Create early estimates using T-shirt sizes and refine as requirements are better understood.

  • Select one or more sizing methods, such as Agile or component-based sizing, to estimate different parts or the whole system
  • Account for software complexity by identifying simple, medium, and complex features
  • Leverage T-shirt sizes derived from QSM's Industry Trends of actual software size measures 
Software Size Estimate Calculator that uses multiple function units and T-shirt sizing

Validate Estimates Against History

Software projects, more often than not, are over-constrained. Without historical software project data, it is difficult to recognize overly aggressive schedules and/or tight budgets.

  • Plot estimate solutions against industry trends or custom trends for core metrics to quickly identify unrealistic expectations - target outcomes that position outside +/- 1 standard deviation
  • Reconstruct vendor cost and schedule proposals to flush out unusually high productivity assumptions to negotiate solutions that benefit both parties
  • Import completed software project data for similar systems to sanity check estimates and ensure estimates align with the organization's proven capabilities
Scatter plots of software metric trends for validating software estimates against historical data

Alternative Solution Comparison

There is never just one way to run a software project! SLIM gives you the power to quickly compute "What-if" scenarios to explore time, effort, and scope tradeoffs and their associated risks.

  • Start with a trend-based solution that indicates the duration and effort required to deliver software of the same type and size
  • Compute and log estimates designed to meet a single goal, such as effort, team size, or project end date, to see what it will take to achieve the goal
  • Log solutions run for each T-shirt size, from very small to very large, and create a template for super quick estimates of the scope that can be delivered within the desired time or budget
Bar charts that compare cost and effort for multiple software estimates

SLIM-Estimate Benefits

Create accurate estimates early

Generate scope-based software estimates early before detailed planning occurs

Evaluate project plan alternatives

Evaluate multiple What-If scenarios to explore potential software project outcomes and the relative risks

Validate software project estimates

Validate internal and vendor software estimates using the QSM Database, one of the largest industry databases of its kind

Negotiate a reasonable commitments

Identify unrealistic expectations and negotiate reasonable schedule and budget commitments

Request a Demo

Register for a live demo of SLIM to see how data-driven software estimation and analytics can improve the way your organization plans and delivers software projects. During the session, you’ll see how SLIM uses proven models and industry benchmark data to help teams produce more accurate estimates, manage in-flight projects, and conduct post-project analysis.