| Course | PUBH 9102 Completing Doctoral Capstone II |
|---|---|
| Week | Week 6 |
| Paper type | Substitution memo |
| Length | About 810 words, 4 pages |
| Format | Memo, APA 7 citations |
| School | Walden University |
| Program | PhD in Public Health |
| Updated | October 2026 |
Free sample paper for PUBH 9102 Week 6
Memorandum
To: Capstone Chair and Committee Member, PUBH 9102
From: Doctoral Student, PhD in Public Health
Date: Week 6
Re: Outcome substitution for the 2025 season after the revised Alder County pool code
The Outcome as Planned
The working document defined a repeat through the division's critical flag: a pair counted when both of its inspections carried at least one flagged item. That definition held for every season through 2024. It cannot be applied unchanged to 2025, and this memo explains why, what replaces it and what is lost.
What Changed, and When
At the opening of the 2025 season, Alder County, a composite county, began inspecting under a revised pool rule modeled on the 2024 edition of the Model Aquatic Health Code, the voluntary national guidance for public pools and spas (Centers for Disease Control and Prevention [CDC], 2024). The revised rule dropped the single critical flag. Inspectors now record each violation in one of three categories: closure-level, meaning the facility must close until corrected; major, meaning correction within a set number of days; and minor. The change was the county's decision and arrived on its own schedule. The study did not choose it, and I learned of it only when the violation file showed category names the codebook did not contain.
The 2024 edition also enlarged the list of conditions that call for immediate closure, adding disabled or missing interlock controls on chemical feed equipment, unsecured chemical storage and free chlorine above 10 parts per million while bathers are present (CDC, 2024). In the county's revised rule each of these became closure-level.
The Crosswalk
Table 1
Mapping of the former critical items to the revised categories
| Former critical item | Revised category | Kind of match | |
|---|---|---|
| Free chlorine or bromine below minimum | Closure-level | Clean | |
| pH outside the allowed range | Major | Clean | |
| Main drain cover missing or broken | Closure-level | Clean | |
| Gate or barrier fails to self-close | Closure-level or major, by type of venue | Split | |
| Lifeguard or safety equipment missing | Major | Clean | |
| Water clarity too low to see the main drain | Closure-level | Clean | |
| Chemical feed operating without circulation | Closure-level | Clean | |
| Not a former critical item | Free chlorine above 10 ppm with bathers present; closure-level | Orphan (new) | |
| Not a former critical item | Unsecured chemical storage; closure-level | Orphan (new) | |
| Operator certificate not on site | Minor | Downgraded | |
Built from the former codebook and the county's 2025 category list; one row per item the division cited at least once in 2021 to 2025.
Seven of the ten rows are clean or nearly clean. The gate row splits because the revised rule treats a failed gate at a splash pad differently from one at a pool. Two rows are new conditions that were never critical before and would have counted as nothing in earlier seasons. One former critical item was downgraded to minor.
The Substitute Outcome
For pairs whose second inspection falls in 2025, a repeat is now a pair in which both inspections record at least one violation that is closure-level or major under the revised rule or critical under the former rule. Where a pair straddles the change, each inspection is read in its own vocabulary. The two orphan items are excluded from the substitute so that 2025 does not gain repeats from conditions earlier seasons could not record, and the downgraded item is still counted when it appears in a 2025 inspection, so 2025 does not lose repeats earlier seasons would have counted.
What Is Lost
Comparability is partial at best. The split gate item means some 2025 inspections at splash pads may record as major what would have been recorded as critical, and the reverse at pools. More basic, inspectors trained on a new rule may cite more or fewer items in their first season with it, which no crosswalk can correct. Changes in how an outcome is recorded are a recognized threat in interrupted time series work, because they can produce a step that looks like an effect of the intervention (Lopez Bernal et al., 2017). Here the code change fell after every district's scheduling switch, so it cannot create the switch effect itself, but it can change the post-switch slope.
A Sensitivity Test Planned
There are 118 pairs whose two inspections straddle the change. The main analysis keeps them under the bridged definition. A sensitivity analysis will remove every pair with a 2025 inspection, which shortens the post-switch series for East District to one season, and will report whether any tier's estimated change in level or trend moves by more than its own confidence interval. A segmented model with one post-switch season cannot estimate a trend for that district (Wagner et al., 2002), and the memo states that in advance so the test is not read as stronger than it is.
Decision Requested
Approval is sought for the bridged definition for the main analysis and the exclusion test above. The deviation log will record the decision and its date.
References
Centers for Disease Control and Prevention. (2024). Model aquatic health code (5th ed.). U.S. Department of Health and Human Services. https://www.cdc.gov/model-aquatic-health-code/php/our-work/index.html
Lopez Bernal, J., Cummins, S., & Gasparrini, A. (2017). Interrupted time series regression for the evaluation of public health interventions: A tutorial. International Journal of Epidemiology, 46(1), 348-355. https://doi.org/10.1093/ije/dyw098
Wagner, A. K., Soumerai, S. B., Zhang, F., & Ross-Degnan, D. (2002). Segmented regression analysis of interrupted time series studies in medication use research. Journal of Clinical Pharmacy and Therapeutics, 27(4), 299-309. https://doi.org/10.1046/j.1365-2710.2002.00430.x
The Walden PUBH 9102 Week 6 instructions
Substitution memos ask candidates to explain why a measure, source or method in the approved plan had to be replaced, and to justify the replacement. Prompts usually ask for the original definition, the reason for the change, the substitute and an honest account of what the substitution costs. Some ask for a sensitivity analysis or other check. The memo goes to the committee, so it typically ends with a request for approval. Faculty look for whether the change is presented as a response to circumstance, with its limits admitted, or as an equivalent swap. Memos that call the substitute identical without evidence tend to receive little credit. Where the change came from a regulator or data owner, prompts often ask for the date and the document that announced it.
Inside the PUBH 9102 Week 6 example
The memo uses a standard header addressed to the chair and committee. It quotes the outcome as defined in the working document, then describes the revised county rule as a dated external event with three violation categories. A paragraph lists the three closure conditions the 2024 code added. A crosswalk table maps each former critical item to its new category and labels the kind of match. The substitute outcome is defined after the crosswalk, with orphan items excluded and the downgraded item still counted. A section on what is lost explains why the change can affect the post-switch slope but not the switch itself. The planned test and a decision request close it.
Reading the PUBH 9102 Week 6 rubric
Committees generally credit a substitution in proportion to how plainly its costs are stated. A memo that announced the new measure and called it equivalent would lose most of the marks, since pool codes do not map one to one. The three-kind crosswalk earns the central share by making imperfect matches visible. Describing the change as a dated event the study did not choose is rewarded for separating circumstance from preference. Accurate use of the 2024 code's added closure conditions shows the candidate read the source. Reasoning about slope and step draws credit for design understanding. The sensitivity test, stated with its own limits, and a clear decision request round out a strong memo.
PUBH 9102 Week 6 help: mistakes that cost marks
Quote your original definition before you describe anything new. Explain what changed outside your control, and when, in plain terms. Build a crosswalk item by item and label each match honestly; do not average imperfect matches into a single statement. Define your substitute only after the crosswalk, so each choice in the definition has a reason. Say what is lost and plan a test of it. End by asking your committee for a decision. If a code or data change has upset your outcome measure, our team can model a memo on your codebook and the new categories. Remember that the committee will read your memo against the original codebook, so attach both lists. Date the decision request so the deviation log can cite the approval.
Get a PUBH 9102 Week 6 example written to your instructions
Send the measure you planned, what replaced it and when, and any mapping between the two you have attempted, plus the Week 6 prompt and rubric. The memo defines both, bridges them row by row, names what comparability was lost and plans a test of whether it matters. A first memo is free, in 24 to 48 hours; the adoption date and crosswalk are fictional.
More PUBH 9102 papers and PhD in Public Health samples
- PUBH 9102 Week 1: Progress Account
- PUBH 9102 Week 2: Protocol Comparison
- PUBH 9102 Week 3: Deviation Log
- PUBH 9102 Week 4: Participation Count
- PUBH 9102 Week 5: Non-Response Note
- PUBH 9102 Week 7: Description Pass
- PUBH 9102 Week 8: Interpretation Firewall
- PUBH 9102 Week 9: Display Check
- PUBH 9102 Week 10: Reconciliation Pass
- PUBH 9102 Week 11: Execution Write-Up
- PUBH 9103 Week 6: Transfer Boundary
- PUBH 9101 Week 6: Sizing Arithmetic
- HLTH 8003 Week 6: Health Model Comparison
- PUBH 8546 Week 6: Small Numbers Memo
PUBH 9102 Week 6 questions, answered
Where can I find a free PUBH 9102 Week 6 sample paper?
The Week 6 substitution memo is above in full, bridging a pool inspection outcome across a county code change.
What changed in the 2024 Model Aquatic Health Code?
Among other updates, it added three conditions calling for immediate closure, including free chlorine above 10 ppm with bathers present.
What is an orphan item in a crosswalk?
A new category with no former counterpart; this memo excludes the two orphans from the substitute outcome.
Why can the code change affect slope but not the switch?
It took effect after every district had already switched schedules.
Does the memo need a decision request?
Yes. It ends by asking the committee to approve the bridged definition and the planned test.