【正文】 es of thumb ? Meetings require: ? material preparation ? rehearsal ? the presentation ? follow up ? times and number of people involved ? Interviews take 23 people plus the interviewee ? Planning estimating takes time too ? Project management 1520% of the technical effort ? Must include individual project control effort: ? LOE, change control, status reporting…… Dec. 2023 Wanjun JIANG GSM PKU ? Project objectives estimating backup: requirements phase ? Tasks Technical hours ? 1. Orientation: (25hrs x 6) 150 ? 2. Interview standards 130 ? 3. Global interview preparation 70 ? 4. Interviews(20) (20x14x2 people) 560 ? individual preparation 3hrs ? interview 4hrs ? minutes 4hrs ? confirm 3hrs ? 5. Standards for report 50 ? 6. Consolidate data 510 ? 7. Write report 110 ? 8. External design plan 70 ? 9. External design standards 50 ? 10. Level of effort tasks 300 ? Total technical hours: 2023 Dec. 2023 Wanjun JIANG GSM PKU ? Estimating pitfalls ? Not identifying all tasks ? Sloppy pletion criteria ? Fuzzy objectives ? Solo estimating ? “ Superstar” estimating ? Using someone else’ s numbers ? Consistently going low or high ? Failure to reestimate, based on resultstodate Dec. 2023 Wanjun JIANG GSM PKU Step 5. Determine staff hours available ? Basis for project objectives schedule ? Hours available/year = 2080 (52weeks x 5days x 8hours) ? Education 80hrs ? Vacation+holidays 160hrs ? Administration 80hrs ? Personal 90hrs ? Others(travel, sickness ) 70hrs ? Total nonproductive hours: 480hrs ? Total productive hours: 1600hrs ? 77% utilization, 133 hours/month Dec. 2023 Wanjun JIANG GSM PKU Dec. 2023 Wanjun JIANG GSM PKU ? Project staffing ? Required staff Actual staff ? analyst skill profile ? written/verbal local/national ? munication through ? technical manages ? word of mouth ? project assurance Dec. 2023 Wanjun JIANG GSM PKU ? Staffing plan construction Required skills for tasks Skills of staff Availability of Staff Precedence diagram Match Task duration Task assignment Diagram Dec. 2023 Wanjun JIANG GSM PKU ? Block out time Not available ? for technical tasks ? Enter nonproject time for each person: ? weekend, holidays, vacation, education … ? Enter time not available for each person ? other assigned time, illness, personal business ? Enter project control LOE tasks to each person ? status meetings, change control support, status reports, miscellaneous meetings and support… ? see figures... Dec. 2023 Wanjun JIANG GSM PKU ? Dec. 2023 Wanjun JIANG GSM PKU ? Dec. 2023 Wanjun JIANG GSM PKU ? Dec. 2023 Wanjun JIANG GSM PKU Step 6. Assign tasks to resources balance against schedule ? Get the right resource at right time. Dec. 2023 Wanjun JIANG GSM PKU ? Enter technical tasks ? factors to be considered ? precedence position of task ? project strategy ? staffing available ? skills required ? skills available ? number of people assigned to task ? efficiency, urgency, plexity Dec. 2023 Wanjun JIANG GSM PKU ? Determine task size ? Tasks Technical hours work weeks ? 1. Orientation: (25hrs x 6) 150 ? 2. Interview standards 130 ? 3. Global interview preparation 70 ? 4. Interviews(20) (20x14x2 people) 560 ? individual preparation 3hrs ? interview 4hrs ? minutes 4hrs ? confirm 3hrs ? 5. Standards for report 50 ? 6. Consolidate data 510 ? 7. Write report 110 ? 8. External design plan 70 ? 9. External design standards 50 ? 10. Level of effort tasks 300 ? Total technical hours: 2023 Dec. 2023 Wanjun JIANG GSM PKU ? Precedence diagram 1 2 3 4 8 6 5 10 9 7 Dec. 2023 Wanjun JIANG GSM PKU Dec. 2023 Wanjun JIANG GSM PKU ? Balancing ? Adjust: task duration, task start date, task assignment…… ? Balance plan, left to right ? Maintain dependencies ? Verify reasonableness Dec. 2023 Wanjun JIANG GSM PKU Dec. 2023 Wanjun JIANG GSM PKU Step 7. Add management tasks