Your SlideShare is downloading. ×
Basis of Estimate for IT Services
Basis of Estimate for IT Services
Basis of Estimate for IT Services
Basis of Estimate for IT Services
Basis of Estimate for IT Services
Basis of Estimate for IT Services
Basis of Estimate for IT Services
Basis of Estimate for IT Services
Basis of Estimate for IT Services
Basis of Estimate for IT Services
Basis of Estimate for IT Services
Basis of Estimate for IT Services
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

Basis of Estimate for IT Services

566

Published on

Based on a recommended practice from AACEi the NESMA has produced a framework for estimating IT Services.

Based on a recommended practice from AACEi the NESMA has produced a framework for estimating IT Services.

Published in: Technology
0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total Views
566
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
18
Comments
0
Likes
0
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. NESMAWG ESTIMATION
  • 2. Background NESMA 2020 Vision of expanding the playing field by collaboration AACE International Association for the Advancement of Cost Engineering International www.aacei.org NESMA interactive member session April 2012 Vision of expanding the playing field by collaboration => WG Estimation
  • 3. Functional Sizing FSM Methods (ISO) COSMIC, NESMA, IFPUG, FiSMA, Mark II Benchmarking: ISBSG International Software Benchmarking Standards Group => ISO standard (based on other industries) Business Needs, what to do with “points” Benchmarking Estimation Estimation: ??? => standard (based on other industries) Basis of Estimate: Best Practise 34R-05
  • 4. Estimation Challenges Estimation Process Consistent Controllable Estimation Verification Defendable Comparable Estimation Validation Defendable Benchmark
  • 5. Purpose of Basis of Estimate Document the overall engagement scope. Communicate the estimator’s knowledge of the engagement by demonstrating an understanding of scope, quality and duration as it relates to cost. Alert the stakeholders to potential cost risks and opportunities. Provide a record of key communications made during estimate preparation. Provide a record of all documents used to prepare the estimate. Act as a source of support during dispute resolutions. Establish the initial baseline for scope, quantities, effort, duration and cost for use in engagement control. Provide the historical relationships between base-lined estimates throughout the project lifecycle. Facilitate the review and validation of the estimates.
  • 6. Content (I) – General Purpose Engagement Scope Description Decomposes the solution into its constituent elements; the Product Breakdown Structure (PBS) Methodology Primary estimating methodology (functional size based, expert based, analogy based, process metrics based, parametric) Estimate Classification Cost Estimate Classification System, AACE Practice 17R-97
  • 7. Content (II) – Basis Design Estimate deliverables (process); architectural documents Sizing Units (e.g. Functional Size, Technical Size, Support Size) Effort Methods (and tools) used to convert to size into effort Planning Activities, Milestones and Constraints Cost Methods and sources used for determining all unit, effort, subcontract, material and expenditures cost
  • 8. Content (III) – Risks Allowances Assumptions Exclusions Exceptions Anomalies or variances to standard estimating practices Risks and Opportunities High risk or opportunity related to cost, duration, quality and/or safety Containments Measures included to prevent and/or mitigate the identified risks Contingencies
  • 9. Content (IV) Reconciliation major differences between the new or re-baselined estimate and the last published estimate Benchmarking comparisons of overall estimate metrics, ratios, and factors with similar engagements, historical data, and industry data Quality Assurance Estimating Team Appendices:  Estimate Deliverables Checklist  Reference Documents sizing report, requirements, designs, texts, notes, specifications  Additional Attachments (optional) reconciliation report, benchmarking report, risk analysis report
  • 10. Schedule for publication Base Document 31-08 ready Review (1) NESMA [45 days] 01-09 15-10 started Rework Version 0.5 16-10 31-10 Review (2) MAIN [45 days] 01-11 15-12 Rework Version 0.8 16-12 15-01 Review (3) AACE International [45 days] 16-01 28-02 Rework Version 1.0 publication AACE / MAIN 01-06
  • 11. AcknowledgementWorking Group Estimation Ton Dekkers (Chair) Galorath International Hans Bernink ING Martin Eisma CGI Ray Sadal CapGemini Jelle de Vries Ordina
  • 12. RequestWho wants to join the review of the Basis of Estimate – Software Services Contact Ton Dekkers ton.dekkers@nesma.nl

×